Simple Definition of micro-

from our Learner's Dictionary

micro-

combining form

1
a
: very small
microfilm
microcomputer
b
: making a sound louder or an image larger
microphone
microscope
2
: one millionth part of a (specified) unit
microsecond
micrometer

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“Micro-.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/micro-. Accessed 24 Jul. 2026.

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