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Webster 1913 Edition

Adj.

[Gr.

μαλακόσ

soft + [GREEK] mouth.]

(Zool.)

Having soft jaws without teeth, as certain fishes.

Adj.

[Gr. soft, and mouth.]

Having soft jaws without teeth; as a fish.

malacostomous ‎(comparative more malacostomous, superlative most malacostomous)