Where does “heterotherapy” come from?

heterotherapy (English) comes from English hetero, from English heterosexual, from English -sexual, from English sexual, from Latin sexuālis, from Latin sexus, from Proto-Italic seksus, from Proto-Indo-European séksus — to cut, cut off, sever.

heterotherapy (English): vaccination with foreign proteins

Definitions

  1. vaccination with foreign proteins

Ancestry of “heterotherapy”, step by step

heterotherapy traces back through two separate lines of ancestry.

via English hetero

StepLanguageWordMeaning
1EnglishheteroHeterosexual: of, pertaining to, or being a...
2EnglishheterosexualSexually attracted to members of the opposite...
3English-sexualForms a noun or adjective describing a state or...
4EnglishsexualArising from the fact of being male or female;...
5Latinsexuālissexual
6Latinsexusdivision; sex; gender
7Proto-Italicseksus
8Proto-Indo-Europeanséksus
9Proto-Indo-Europeansek-to cut, cut off, sever

via English therapy

StepLanguageWordMeaning
1EnglishtherapyAttempted remediation of a health problem...
2New Latintherapīa
3Ancient Greekθεραπείαa waiting on service; medical treatment
4Ancient Greekθεραπεύωto wait on, attend, serve; to obey; to flatter,...
5Ancient Greek-εύωAdded to the stems of agent or other nouns in...
6Ancient Greek-εύςAdded to noun or adjective stems to form a...
Every word from Proto-Indo-European sek-Every word from Proto-Indo-European séksusEvery word from Proto-Italic seksus