Where does “micromollusc” come from?

micromollusc (English) comes from English mollusc, from French mollusque, from New Latin Mollusca, from Latin molluscus, from Latin mollis, from Latin molduis, from Proto-Italic moldus, from Proto-Indo-European *ml̥dus — to soften, to melt.

Ancestry of “micromollusc”, step by step

micromollusc traces back through two separate lines of ancestry.

via English mollusc

StepLanguageWordMeaning
1EnglishmolluscA soft-bodied invertebrate of the phylum...
2Frenchmollusquemollusc
3New LatinMollusca
4Latinmolluscussoft
5Latinmollissoft, delicate to the touch; pliant, flexible,...
6Latinmolduis
7Proto-Italicmoldus
8Proto-Indo-European*ml̥dussoft, weak
9Proto-Indo-European(s)meld-to soften, to melt

via English micro

StepLanguageWordMeaning
1EnglishmicroSmall, relatively small; short form of...
2Ancient Greekμικρόςlittle, small
3Proto-Indo-Europeanmēy-soft, tender, dear
Every word from Proto-Indo-European (s)meld-