Where does “rhamphotheca” come from?

rhamphotheca (English) comes from English theca, from Latin thēca, from Ancient Greek θήκη, from Ancient Greek τίθημι, from Proto-Indo-European dʰeh₁- — to do, put, place.

rhamphotheca (English): A thin horny sheath of keratin on the outer...

Definitions

A thin horny sheath of keratin on the outer...

Ancestry of “rhamphotheca”, step by step

rhamphotheca traces back through two separate lines of ancestry.

via English theca

Step	Language	Word	Meaning
1	English	theca	Any external case or sheath; The pollen-producing...
2	Latin	thēca	a case, envelope, sheath
3	Ancient Greek	θήκη	box, chest; grave, tomb; sword sheath
4	Ancient Greek	τίθημι	I put, place, set; I make, cause to be; I make
5	Proto-Indo-European	dʰeh₁-	to do, put, place

via Ancient Greek ῥάμφος

Step	Language	Word	Meaning
1	Ancient Greek	ῥάμφος	crooked beak of birds of prey, bill

Every word from Proto-Indo-European dʰeh₁- →Every word from Ancient Greek τίθημι →Every word from Ancient Greek θήκη →