The millimetre (SI symbol: mm; international spelling) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, the SI base …

The meaning of MILLIMETER is a unit of length equal to 1/1000 meter.

MILLIMETER definition: a unit of length equal to one thousandth of a meter and equivalent to 0.03937 inch. mm See examples of millimeter used in a sentence.

A millimeter can be defined as a metric unit used to measure the length of small or tiny objects such as measuring lines, the length of a pencil tip, etc. The word is usually expressed as 'mm' …

Oct 30, 2025 · A millimeter (mm) is a unit of measurement. It forms part of the metric system and, although this isn’t the dominant system in the US, you’ll likely use mm units a lot.

Chondrules are millimeter-sized pieces of previously molten matter embedded in chondrite-type meteorites.

millimetre (mm), unit of length equal to 0.001 metre in the metric system and the equivalent of 0.03937 inch.

A millimeter is a unit of length in the metric system, represented by the symbol "mm". The prefix "milli" derives from the Latin word "mille," meaning one-thousandth.

Illustrated definition of Millimeter | Millimetre: A Metric measure of distance used for small lengths. The abbreviation is mm There are 1000 mm in one meter....

As the name suggests, a millimeter is equal to one thousandth of a meter, making it a very small unit of measurement. To put the size of a millimeter into perspective, it is roughly the thickness …