Where does “deuterosome” come from?

deuterosome (English) comes from English some, from Middle English som, from Old English sum, from Proto-West Germanic *sum, from Proto-Germanic sumaz, from Proto-Indo-European sem- — together, one.

deuterosome (English): A mass of fibrous granules in the centrosphere

Definitions

A mass of fibrous granules in the centrosphere

Ancestry of “deuterosome”, step by step

deuterosome traces back through two separate lines of ancestry.

via English some

Step	Language	Word	Meaning
1	English	some	A certain number, at least two; An indefinite...
2	Middle English	som	some
3	Old English	sum	some
4	Proto-West Germanic	*sum	some
5	Proto-Germanic	sumaz	some (one), a certain (one)
6	Proto-Indo-European	sem-	together, one

via English deutero

Step	Language	Word	Meaning
1	English	deutero	second
2	Ancient Greek	δεύτερος	second of two; second, next, another
3	Proto-Indo-European	dews-	to lack, need, require

Every word from Proto-Indo-European sem- →Every word from Proto-Germanic sumaz →Every word from Proto-West Germanic *sum →