tung4 hung2瞳孔

Jyutpingtung4 hung2

Yaletùhng húng

名詞Common

Definition

Pupil; the circular opening in the center of the iris.

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How it's used

瞳孔 is a formal anatomical term used primarily in medical or scientific contexts. In casual daily conversation, people almost always refer to this part of the eye simply as 眼珠, which is a broader term that can also encompass the iris or the entire eyeball depending on the context. Using 瞳孔 in a casual setting might sound overly clinical or like you are describing a specific medical symptom.

Measure word

go3個go

Examples

keoi5佢ziu3照jyun4完din6電tung2筒，tung4瞳hung2孔zik1即hak1刻sau1收suk1縮zo2咗。

After the torch shone on them, his pupils contracted immediately.

Common phrases

tung4瞳hung2孔fong3放daai6大

pupil dilation

tung4瞳hung2孔sau1收suk1縮

pupil constriction

Common mistake

Learners often confuse 瞳孔 with 眼珠. While 瞳孔 specifically refers to the black opening, 眼珠 is the everyday word for the visible part of the eye, so using 瞳孔 when you just mean the eye itself will sound unnatural.