漢：來源於希臘語，意爲“small”，一般用於科技術語。前綴micro- 與詞根micro “外形”長的一樣，意思也一樣。與其意思相近的詞根是mini (minimum, minority,minus,minor,minimize,miniature,minute,mince,minion,minister,minibus,miniskirt,comminution)，異形同義前綴：minut-，parvi-，pusill-，baco-pauro- 其中，前三者來源於拉丁語，且前者來源於拉丁語 minutus 小，爲它相應的拉丁語前綴，如：minute 微小、minor 較小的，次要，而後兩者都來源於希臘語，且不常用。反義前綴：macro- 大。

英：word-forming element meaning "small, microscopic; magnifying; one millionth," from Latinized comb. form of Gk. mikros "small, little, petty, trivial, slight" (see mica).

1.microbe
n.tiny living creature that can be seen only with the help of a microscope,especially kinds of bacteria causing diseases and termentation細菌，微生物 *micro(=small),be<bio(=life)
例句：I peered into the microscope to get my first glimpse at living microbes.我第一次通過顯微鏡觀察活著的細菌。

2.microcosm
n.something considered as representing mankind or the universe,on a small scale 微觀世界觀*micro(=small),cosm(=universe)
Each city is a microcosm of human society.每座城市都是人類社會的一個縮影。

3.micrometer
n. device for measuring very small objects 測微計 *micro(=small),meter(=measure)
例句：You'll need a micrometer to measure and set the gap between the electrodes.要測量或設置好兩個電極之間的間距需要專門的測微計。

4.microorganism
n. organism so small sa to be visible only under a microscope 微生物 *micro(=small),organ(=instrument)
例句：Microorganisms are the basic building blocks of all life.微生物是所有生命的最基本的搆成成分。

5.microlitre [micro- 微，小 + litre 陞 →]
n. 微公陞

6.microsecond [micro - 小,微 + second 秒 →]
n. 微秒

7.microampere [micro- 微，小 + ampere 安培；安（電裡麪的物理單位）]
n. 微安

8. microphone [micro- 微，小 + phon 聲音 + -e 後綴 →“用來傳播聲音的很小的東西”→]
n.麥尅風

9.microscope [micro- 微 + scop 看，觀察 + -e 後綴→“能夠看很小東西的東西”→]
n. 顯微鏡

10.microtome → 切片機 [micro- 微, 小 + tom 切，割 +　－e後綴 →“能把物躰切成一小片一小片的機器”→]