Where does “microrad” come from?

microrad (English) comes from English rad, from English radiation, from Latin radiatio, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere, from Latin dis- — small stone, pebble; gravel, rubble.

microrad (English): A unit of radiation equal to one millionth of a...

Definitions

  1. A unit of radiation equal to one millionth of a...

Ancestry of “microrad”, step by step

microrad traces back through two separate lines of ancestry.

via English rad

StepLanguageWordMeaning
1EnglishradClipping of radical; excellent; A non-SI unit of...
2EnglishradiationThe shooting forth of anything from a point or...
3Latinradiatioglittering, shining, radiation
4Latin-tiōtion, -ation, -ing
5Latindissertātiō(spoken) dissertation, discourse, disquisition
6Latindissertusarranged, disposed; explained
7Latindissereresecond-person singular future passive indicative...
8Latindis-asunder, apart, in two; reversal, removal;...
9Latincalceusshoe
10Latincalxlimestone; chalk; the finish line
11Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English micro

StepLanguageWordMeaning
1EnglishmicroSmall, relatively small; short form of...
2Ancient Greekμικρόςlittle, small
3Proto-Indo-Europeanmēy-soft, tender, dear
Every word from Ancient Greek χάλιξEvery word from Latin -tiōEvery word from Latin dis-