si1 mai5絲米丝米

Jyutpingsi1 mai5
Yalesī máih

Definition

Decimillimetre; a unit of length equal to one-tenth of a millimetre.

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How it's used

Refers specifically to the unit of one tenth of a millimetre, which is equivalent to one hundred micrometres. It is primarily used in technical, engineering, or manufacturing contexts where high precision is required. Outside of these professional fields, it is rarely heard in everyday casual conversation.

Examples

This thread is a few decimillimetres thick.
How many decimillimetres did you measure?

Common phrases

precise decimillimetre

Common mistake

Do not confuse this with 絲, which is a colloquial term for a very small amount or a fraction, often used metaphorically in daily life. Using 絲米 in a non-technical context may sound overly pedantic or confusing to native speakers.

Grammar color guide

Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector