Where does “semidominant” come from?

semidominant (English) comes from English semi, from English semi-, from Latin sēmi-, from Proto-Indo-European sēmi — half; partially.

semidominant (English): Exhibiting incomplete dominance

Definitions

  1. Exhibiting incomplete dominance

Ancestry of “semidominant”, step by step

semidominant traces back through two separate lines of ancestry.

via English semi

StepLanguageWordMeaning
1EnglishsemiA semi-detached house; A semitrailer; a...
2Englishsemi-half; partial, incomplete; somewhat, rather,...
3Latinsēmi-half
4Proto-Indo-Europeansēmihalf; partially

via English dominant

StepLanguageWordMeaning
1EnglishdominantThe fifth major tone of a musical scale (five major steps above the note in question); thus G is the dominant of C, A of D, and so on
2Middle Frenchdominant
Every word from Proto-Indo-European sēmiEvery word from English semi-Every word from English semi