Where does “semitoroid” come from?

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

semitoroid (English): A surface formed by the intersection of a toroid and a plane through its centre

Definitions

  1. A surface formed by the intersection of a toroid and a plane through its centre

Ancestry of “semitoroid”, step by step

semitoroid 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 toroid

StepLanguageWordMeaning
1EnglishtoroidA surface generated by a closed curve rotating...
Every word from Proto-Indo-European sēmiEvery word from English semi-Every word from English semi