Definition of pachyderm:

part of speech: noun

One of an order of non- ruminant, hoofed mammals, distinguished for the thickness of their skin, as the elephant:- pl. PACHYDERMS or PACHYDERMATA.

part of speech: noun

Formerly, one of a group of thick- skinned animals such as the elephant, rhinoceros, etc.

Usage examples for pachyderm:

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A solid fence of stone, brick, etc.; the outside structure which incloses a building; a partition forming the side of a room; a structure for defense; means of protection. ...