mm
mm — abbreviation
1. the short form used in measurements, labels, and notes for millimetre
the short form used in measurements, labels, and notes for millimetre
Mira bought a 6 mm drill bit for the shelf brackets.
number + mm before a tool noun
The rain gauge showed 18 mm after the storm ended.
number + mm for recorded rainfall
The tailor marked a 12 mm hem before cutting the fabric.
We used a 35 mm film camera on the school trip.
The dentist found a 3 mm gap between the front teeth.
- millimetre
the full British spelling used when the unit is written out
- millimeter
the full American spelling used when the unit is written out
文法句型
number + mm
mm + noun
用法筆記
It usually comes after a number in measurements and product descriptions. The abbreviation is the same in British and American English even though the full word is spelled 'millimetre' in British English and 'millimeter' in American English.
常見錯誤
mm — noun
1. a short written form in chemistry for millimolar, meaning a concentration of one
a short written form in chemistry for millimolar, meaning a concentration of one thousandth of a mole per litre
The nurse prepared a 5 mM glucose solution for the cell test.
number + mM in lab concentrations
Our buffer stayed stable at 10 mM during the afternoon experiment.
at + number + mM
Jia measured 2 mM calcium in the water sample from school.
The chart shows the drug level rising from 1 mM to 4 mM.
- millimolar
the full scientific term written out instead of the abbreviation
文法句型
number + mM
mM of + substance
at + number + mM
用法筆記
In science writing, this abbreviation is usually written as 'mM', with a capital second letter. Writers use that form to avoid confusion with 'mm' for millimetre.