Definition of micromillimetre in English:

micromillimetre

(also micromillimeter)

Pronunciation /ˈmʌɪkrə(ʊ)ˌmɪlɪmiːtə/

noun

  • 1Biology
    rare One thousandth of a millimetre, a micron or micrometre.

  • 2In general use: an extremely tiny distance.

Origin

Mid 19th century. From micro- + millimetre.