Definition of siphonostomatous
1 : having the front edge of the aperture of the shell prolonged in the shape of a channel for the protection of the siphon —used of various marine snails
2 : having a tubular mouth
3 [New Latin Siphonostomata + English -ous] : of or relating to the Siphonostomata
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Origin and Etymology of siphonostomatous
siphon- + -stomatous
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