Where does “hypoplastron” come from?

hypoplastron (English) comes from English plastron, from French plastron, from Italian piastrone, from Italian -one, from Latin -ō, from Proto-Indo-European -ō — Derives nouns from roots.

hypoplastron (English): The third lateral plate in the plastron of...

Definitions

  1. The third lateral plate in the plastron of...

Ancestry of “hypoplastron”, step by step

hypoplastron traces back through two separate lines of ancestry.

via English plastron

StepLanguageWordMeaning
1EnglishplastronThe nearly flat part of the shell structure of a...
2Frenchplastronbreastplate; plastron; chest pad; chest...
3Italianpiastroneplastron; slab
4Italian-oneAlterative suffix used to form augmentatives;...
5Latinsuffixed to nouns or adjectives. Originally a-stem nouns. Later extended to nouns with other stems. Forms regular first-conjugation verbs
6Proto-Indo-EuropeanDerives nouns from roots

via English hypo

StepLanguageWordMeaning
1EnglishhypoMelancholy; a fit of ‘hypochondria’; a morbid...
2Englishhypo-Below; beneath; under; Deficient; less than...
3Ancient Greekὑπό
4Proto-Indo-Europeanupóunder, below
5Proto-Indo-Europeanh₃ewp-
Every word from Proto-Indo-European Every word from Latin Every word from Italian -one