- 1nB1/ˈmɪləˌmiːtər/ · /ˈmɪləˌmiːtə/公釐；毫米
a unit for measuring length, used for very small distances. One metre is 1,000 millimetres, and one is 10 millimetres. It is written as mm.
示範例句 · Example
Our teacher asked us to measure each leaf in millimetres, not centimetres.
逐字我們的老師要求我們用公釐測量每一片葉子，而不是公分。
millimetre 是長度單位，用來量「很小」的東西——一公尺等於 1,000 公釐，一公分等於 10 公釐，寫的時候縮寫成 mm。台灣日常講「公釐」或「毫米」，量書本厚度、鉛筆芯、下雨量都會用到。這個字可以想成從字首 milli-（可以想成「千分之一」）長出來的：millimetre 是一公尺的千分之一，同一個想法也在 millilitre（毫升）和 milligram（毫克）裡。
常見搭配
measure something in millimetres
以公釐為單位測量某物
to give the size of something using millimetres
Mei measured the seed in millimetres so the numbers were easier to compare.
a few millimetres
幾公釐；一點點的距離
a very small distance
The shelf was a few millimetres too wide for the box.
millimetres long / wide / thick
…公釐長／寬／厚
used after a number to give length, width, or thickness
Each stripe on the ruler is one millimetre wide.
to within a millimetre
精準到一公釐以內
so exactly that the difference is less than one millimetre
The parts have to fit to within a millimetre.
35 millimetre (film / camera)
三十五釐米（底片／相機）
the standard size of film used in many older cameras
Grandpa still keeps his old 35 millimetre camera on the shelf.
意思相近
core核心畫面
millimeter 是 millimetre 的美式拼法，意思一樣。多益（TOEIC）用美式拼法。
millimeter · millimetre
Think of the smallest lines printed on a ruler — the little marks packed ten to a . One of those tiny steps is a millimetre, and a thousand of them laid end to end make one metre. It is the unit you reach for when a is already too coarse: the thickness of a , the gap in a door, how much a screw is off.
意思相近
mm
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
這個拼法也被記錄為下列字的變化形：
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。