pupil
noun
Simple meaning
The contractile aperture in the center of the iris of the eye.
Pronunciation
Say it like this:
pyoopuhlSay the bold part a little louder.
IPA pronunciation (US)
ˈpjupəl
This word is pronounced essentially the same in American and British English, so one transcription covers both.
IPA (International Phonetic Alphabet) is a standard way of writing speech sounds.
Definition
Everyday modern meanings first, grouped by part of speech.
noun
anatomy
The contractile aperture in the center of the iris of the eye; resembles a large black dot
anatomy
The hole in the middle of the iris of the eye, through which light passes to be focused on the retina.
One who studies under supervision of a renowned expert in their field.
Word at a Glance
- Difficulty
- B2 · Upper Intermediate
- Frequency
- Moderately Common
- Typical Use
- Neutral / general English
Word Aura™
How this word commonly comes across.
Aura for this meaning
This meaning: The contractile aperture in the center of the iris of the eye; resembles a large black dot
Used this way, pupil is a specialist word that usually carries little praise or criticism of its own. This is a clinical use: it belongs to medical description, where it is factual rather than emotive.
- Emotional tone
- Neutral
- Formality
- Specialist/technical
- Intensity
- Not strongly marked
- How common
- Specialized
- Connotation
- Clinical and technical
- Usage feel
- Technical and specialized
Where it naturally appears
- Medicine/healthcare
- Science
- Technical/specialist writing
Usage note
In general conversation this sense usually needs explaining — outside its field, people reach for a plainer word.
Word Aura describes common impressions, not a measurement. Tone changes with sentence, speaker, relationship and situation.
More ways to use pupil
- “The teacher explained the lesson clearly to her bright pupil.”
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Common Patterns and Combinations
How this word naturally appears with others.
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Word Family
Related forms, grouped by how they connect.
Related words
Connected by subject or meaning, not by word formation.
Reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller.
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Dictionary data from Wiktionary via the Free Dictionary API. Simple meanings, combinations and word intelligence are built from verified reference data, no AI is used to load this page.