Top Definition
(Noun) Sven-iss-id-ay
The penguin family.

Adjective: Spheniscidine Sven-iss-id-een
Twitcher1: I say old chap, that's a strange looking bird, do you think it belongs to the Spheniscidae?

Twitcher2: No my good man, that is a great auk. An uncommonly fine specimen it is too. Very spheniscidine I do agree.
by Charles K Darwin April 05, 2008

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