induction
gb/ɪndˈʌkʃən/ us/ɪndˈʌkʃən/
B2
英語
~ 8700
語義
0件の語義
名詞
B2
event
1
formal introduction to a role or group
The official time when someone is welcomed into a new job, position, or group and is given first information or training.
用法パターン：
the induction of [someone] into [a job/organization]
よくある間違い：
Learners sometimes confuse "induction" with "introduction" and use *induction* in everyday informal contexts where native speakers would say "Let me introduce you." "Induction" is usually used for formal or organized processes in workplaces, schools, or official groups, not for casual social meetings.
類義語
orientation (Common in workplaces and schools; focuses slightly more on practical information and training than on formality or ceremony.)
|
onboarding (Business jargon; emphasizes the whole process of helping new employees adjust to a job or company.)
対義語
dismissal (Refers to formally removing someone from a job, the reverse of formally bringing them into it.)
コロケーション
staff induction
|induction program
|induction course
|induction ceremony
|new employee induction
|induction day
テーマ
work
|education
|society
|relationships
例文
- All new staff must attend a two-day induction before starting work on site.
- Her induction into the company included safety training and a tour of the building.
- The museum held an induction ceremony for the latest members of its board of trustees.
- During the induction, the manager explained the company’s values and policies.
- The hall was filled with fans for the singer’s induction into the Rock & Roll Hall of Fame.
学習者向け例文
- My first day was an induction for new workers.
- At the induction, they told us about the company rules.
- We met our team leader during the induction.
- He felt nervous before his induction into the sports club.
- The school has an induction day for new students.
名詞
technical
C1
action
2
reasoning from examples to general rule
A way of thinking where you look at many examples and then say what is usually true for all similar cases.
用法パターン：
induction from [examples/observations] to [a general rule]
よくある間違い：
Learners may confuse "induction" with "deduction" because they look and sound similar. Remember: induction = from specific examples to a general rule; deduction = from a general rule to a specific conclusion.
類義語
generalization (Focuses on the end result (a broad statement) rather than the careful reasoning process; often used more critically.)
|
inductive reasoning (A near-equivalent phrase that explicitly names the type of thinking involved.)
対義語
deduction (Deduction moves from general rules to specific conclusions, the opposite direction of induction.)
コロケーション
induction and deduction
|scientific induction
|empirical induction
|induction in philosophy
|induction from data
テーマ
science
|academic
|thinking
|education
例文
- In science, many theories are built by induction from experimental results.
- Hume famously questioned whether induction can ever be logically justified.
- From a small sample, any induction about the whole population is uncertain.
- The course introduces students to induction and deduction in everyday decision-making.
- Data scientists rely heavily on induction when they look for patterns in large datasets.
学習者向け例文
- Induction is important in scientific thinking.
- With induction, we see many cases and then make one general idea.
- The teacher showed how induction can lead to a wrong rule.
- They used induction to guess a rule from the numbers.
- Philosophy books often talk about induction and deduction.
名詞
technical
C1
action
3
medical starting of childbirth
A hospital process where doctors make labor start using medicine or other medical methods.
用法パターン：
the induction of [labor] at [time]
よくある間違い：
Learners may think "induction" here just means any start of labor. In medical English it usually means labor is started by doctors, not that it begins by itself. Also, this sense is almost always used in the phrase "induction of labor" or "labor induction."
類義語
labor induction (A more specific term that clearly says the induction is about childbirth.)
対義語
spontaneous labor (Refers to labor that begins naturally, without medical induction.)
コロケーション
induction of labor
|labor induction
|schedule an induction
|chemical induction of labor
|failed induction
テーマ
medicine
|health
|family
|body
例文
- Because the pregnancy was overdue, the doctor recommended an induction of labor.
- She checked into the hospital on Monday evening for a planned induction.
- The midwife explained the risks and benefits of induction before the couple signed the consent form.
- After twelve hours, the induction had not worked and they decided on a cesarean section.
- Some women prefer to avoid induction unless there is a clear medical reason.
学習者向け例文
- The doctor says I may need an induction next week.
- She went to the hospital for an induction of labor.
- The induction started in the morning, and the baby came at night.
- They talked about the possible side effects of induction.
- He took time off work for his partner’s induction.
名詞
technical
C2
event
4
electromagnetic production of electricity
A physical process where a changing magnet field makes electricity in a nearby wire or metal.
用法パターン：
induction of [current/voltage] in [a conductor]
よくある間違い：
Learners may confuse "induction" with "inductor" or use it to mean any electric effect. In physics, this sense of "induction" specifically describes current or voltage created by a changing magnetic field, not just any flow of electricity.
類義語
electromagnetic induction (More specific technical term; explicitly names the electromagnetic cause of the effect.)
対義語
conduction (Conduction refers to transfer of electric charge or heat through a material, contrasted with the generation of current by induction.)
コロケーション
electromagnetic induction
|magnetic induction
|induction motor
|induction cooker
|induction heating
|induction coil
テーマ
science
|technology
|engineering
例文
- Generators use electromagnetic induction to turn mechanical motion into electricity.
- Faraday’s experiments on induction changed the history of electrical engineering.
- Induction heating is used in modern cooktops to heat pans quickly and efficiently.
- The design of the induction motor makes it robust and easy to maintain.
- Students repeated a classic experiment to observe induction in a simple coil and magnet setup.
学習者向け例文
- An induction motor works using a changing magnetic field.
- The teacher showed induction by moving a magnet near a coil of wire.
- Many new stoves use induction to heat metal pots.
- Faraday studied induction in the nineteenth century.
- Induction is very important in power stations.
名詞
technical
C2
action
5
mathematical proof by induction
A way to prove a math rule is true for all whole numbers by proving it for the first number and then proving that if it is true for one number, it is also true for the next number.
用法パターン：
proof by induction on [a variable]
よくある間違い：
Learners sometimes mix this mathematical sense of "induction" with the logical sense of induction from examples. In mathematics, "induction" almost always refers to the specific proof method "mathematical induction," not to reasoning from many examples.
類義語
mathematical induction (Standard full term for this proof technique; identical in technical use.)
対義語
direct proof (A contrasting proof style that does not rely on an inductive step from one case to the next.)
コロケーション
proof by induction
|mathematical induction
|strong induction
|use induction to prove
|induction on n
テーマ
mathematics
|academic
|education
|science
例文
- We will now give a proof of this formula by induction on n.
- The homework asks you to use induction to show that the sum of the first n odd numbers is n squared.
- Strong induction is often easier to apply than simple induction in number theory.
- Her thesis begins with a brief review of induction and other methods of proof.
- If you are not careful with the inductive step, an induction can fail even when the statement is true.
学習者向け例文
- The teacher showed a simple proof by induction.
- We used induction to prove a rule about even numbers.
- In class, I learned how induction works in math.
- This problem is easier if you use induction on n.
- Induction is a common method of proof in algebra.
文法
辞書形
induction
IPA
GB/ɪndˈʌkʃən/
US/ɪndˈʌkʃən/
音節・強勢
in - duc - tion （3音節）
Stress on 2nd syllable (duc)
活用形
Noun
- Base: induction
- Plural: induction, inductions
関連語
Forms
inductions
noun
Core family
Related words
Negative and opposite forms
deduction
noun B1
deductive
adjective
Advanced or less common
inductor
noun
表現
induction ceremony
1/ɪndˈʌkʃən sˈɛɹɪmˌoʊni/
fixed phrase
formal
formal event to welcome new member
A special formal event where a person is officially welcomed into a group, job, or honor.
例文
- The club held an induction ceremony for its new members.
- Her induction ceremony into the Hall of Fame was broadcast live on television.
- Parents were invited to attend the induction ceremony for the student council.
induction of labor
1/ɪndˈʌkʃən əv lˈeɪbɚ/
fixed phrase
technical
medical starting of labor
A medical process where doctors make labor start, usually with medicine or other hospital methods.
例文
- The doctor scheduled an induction of labor for forty-one weeks.
- An induction of labor may be suggested if the pregnancy goes far past the due date.
- She asked about the possible risks before agreeing to an induction of labor.
mathematical induction
1/mˌæθəmˈætɪkəl ɪndˈʌkʃən/
fixed phrase
technical
standard math induction method
A common method in mathematics to prove that a rule is true for every natural number, using a first case and a step from one case to the next.
例文
- We will use mathematical induction to prove this identity.
- The textbook introduces mathematical induction in the chapter on sequences.
- Mathematical induction is a powerful tool, but it must be applied carefully.
proof by induction
1/pɹˈuf bˈaɪ ɪndˈʌkʃən/
fixed phrase
technical
mathematical proof using induction
A way to show a math rule is true for all whole numbers by proving it for the first number and then showing it is true for the next number if it is true for one number.
例文
- The lecturer demonstrated a proof by induction for the binomial theorem.
- Your assignment is to give a proof by induction that this sequence is always positive.
- We often use proof by induction when dealing with statements about natural numbers.
staff induction
1/stˈæf ɪndˈʌkʃən/
fixed phrase
introduction process for new staff
The organized process a workplace uses to welcome new workers and give them important first information and training.
例文
- All new teachers must attend a staff induction before the term starts.
- The company runs a one-week staff induction for graduates.
- Health and safety training is part of the staff induction program.