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orificial
Derived word form of orifice

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The former genus possesses an upright orificial tubule and has zoœcia separated by basal tubules.

From Freshwater Sponges, Hydroids & Polyzoa by Annandale, Nelson

The zoœcia when young are practically recumbent, each being of an ovoid form and having a stout, distinctly quadrate orificial tubule projecting upwards and slightly forwards near the anterior margin of the dorsal surface.

From Freshwater Sponges, Hydroids & Polyzoa by Annandale, Nelson

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