English

femtoplankton

From femto- + plankton.

Proto-Germanic *fimftehun ‘fifteen’

Old Norse fimmtán ‘fifteen’

Danish femten ‘fifteen’

Ancient Greek πλάζω ‘I turn aside, wander’

Ancient Greek πλαγκτός ‘drifter’

German Plankton

Today it means

noun The plankton composed of cells smaller than 0.2 micrometers.

Language periods are conventional ranges, not dates for this word.

Etymograph / femtoplankton