from
The Collaborative International Dictionary of English v.0.48
Diodon \Di"o*don\, n. [Gr. di- = di`s- twice + 'odoy`s,
'odo`ntos, a tooth: cf. F. diodon.]
1. (Zool.) A genus of spinose, plectognath fishes, having the
teeth of each jaw united into a single beaklike plate.
They are able to inflate the body by taking in air or
water, and, hence, are called {globefishes},
{swellfishes}, etc. Called also {porcupine fishes}, and
{sea hedgehogs}.
[1913 Webster]
2. (Zool.) A genus of whales.
[1913 Webster]