Where does “erythrocruorin” come from?

erythrocruorin (English) comes from English in, from Middle English in, from Old English in, from Proto-West Germanic *in.

erythrocruorin (English): A large oxygen-carrying protein related to chlorocruorin, and found in many annelids

Definitions

  1. A large oxygen-carrying protein related to chlorocruorin, and found in many annelids

Ancestry of “erythrocruorin”, step by step

erythrocruorin traces back through two separate lines of ancestry.

via English in

StepLanguageWordMeaning
1EnglishinUsed to indicate location, inclusion, or position...
2Middle EnglishinAny kind of accomodation; particularly; A home or...
3Old Englishinin; Alternative form of inn
4Proto-West Germanic*in—

via English cruor

StepLanguageWordMeaning
1EnglishcruorThe colouring matter of the blood; The clotted...
2Latincruorblood, gore; murder, bloodshed
3Proto-Indo-Europeankrewh₂-blood outside the body
Every word from Proto-West Germanic *in →