Where does “semipenniform” come from?

semipenniform (English) comes from English penniform, from English -form, from English formic, from French formique, from French -ique, from Middle French -ique, from Old French -ique, from Latin -icus — forms adjectives with the sense of 'of or pertaining to'.

semipenniform (English): Half or partially penniform

Definitions

  1. Half or partially penniform

Ancestry of “semipenniform”, step by step

semipenniform traces back through two separate lines of ancestry.

via English penniform

StepLanguageWordMeaning
1EnglishpenniformFeather-shaped; A symbol that is shaped like a...
2English-formHaving the shape or form of; looking like;...
3EnglishformicOf or pertaining to ants; Of, pertaining to or...
4Frenchformiqueformic
5French-iqueUsed to form adjectives from nouns: -ic, -ical,...
6Middle French-iqueic
7Old French-ique-ic
8Latin-icusbelonging to; derived from; of or pertaining to;...
9Proto-Italic*-ikosforms adjectives with the sense of 'of or pertaining to'

via English semi

StepLanguageWordMeaning
1EnglishsemiA semi-detached house; A semitrailer; a...
2Englishsemi-half; partial, incomplete; somewhat, rather,...
3Latinsēmi-half
4Proto-Indo-Europeansēmihalf; partially
Every word from Proto-Italic *-ikosEvery word from Latin -icusEvery word from French -ique