Is the word penguin Latin

The New-Latin name for the penguin is sphenisciformis.Sphenisciformes is the taxonomical order containing penguins. It means "spheniscus-shaped" where "spheniscus" is a particular genus of penguin including the Galapagos penguin. (So "Sphenisciformis" means "shaped like a Galapagos penguin.") "Spheniscus" in turn comes from the greek Word σφήν (sphen) meaning "wedge," referring to the shape of the wing.

Sphenisciformis is a third-declension i-stem noun. Plural "sphenisciformes."