Lacking definite form or shape; having no fixed or regular structure.
From Modern Latin amorphus, derived from Greek a- (without) + morphe (form). Used in scientific Latin names and descriptions.
This is basically the Latin version of 'amorphous'—scientists used it in formal descriptions when English wasn't fancy enough, so you'd find it in old books describing weird creatures as 'amorphus' to make them sound properly mysterious.
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