si1 mai5絲米丝米
Jyutpingsi1 mai5
Yalesī máih
Definition
Decimillimetre; a unit of length equal to one-tenth of a millimetre.
neutralother
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
Related words
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
Grammar guides
- Aspect markersCantonese has no tenses, but it does have aspect markers. Learn how zo2, gwo3, gan2, and hai2 dou6 show completion, experience, and ongoing action.
- In 30 secondsThe whole language at a glance. No tenses, no plurals, six tones, sentence particles. Read this before you dive into any specific topic.
- ParticlesSentence particles add tone, emotion, and nuance. Learn the most common particles in Cantonese and how to use them.



