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Asiphonea :: Asiphonea (n. pl.) Alt. of Asiphonid.

Siphon :: Siphon (n.) A device, consisting of a pipe or tube bent so as to form two branches or legs of unequal length, by which a liquid can be transferred to a lower level, as from one vessel to another, over an intermediate elevation, by the action of the pressure of the atmosphere in forcing the liquid up the shorter branch of the pipe immersed in it, while the continued excess of weight of the liquid in the longer branch (when once filled) causes a continuous flow. The flow takes place only when the

Siphonophoran :: Siphonophoran (a.) Belonging to the Siphonophora.

Siphon :: Siphon (n.) A siphon bottle.

Physophorae :: Physophorae (n. pl.) An order of Siphonophora, furnished with an air sac, or float, and a series of nectocalyces. See Illust. under Nectocalyx..

Physograde :: Physograde (n.) Any siphonophore which has an air sac for a float, as the Physalia..

Diphyozooid :: Diphyozooid (n.) One of the free-swimming sexual zooids of Siphonophora.

Siphon :: Siphon (n.) One of the tubes or folds of the mantle border of a bivalve or gastropod mollusk by which water is conducted into the gill cavity. See Illust. under Mya, and Lamellibranchiata..

Siphonostome :: Siphonostome (n.) Any parasitic entomostracan of the tribe Siphonostomata.

Siphonostome :: Siphonostome (n.) A siphonostomatous shell.

Pneumatocyst :: Pneumatocyst (n.) A cyst or sac of a siphonophore, containing air, and serving as a float, as in Physalia..

Siphonet :: Siphonet (n.) One of the two dorsal tubular organs on the hinder part of the abdomen of aphids. They give exit to the honeydew. See Illust. under Aphis.

Siphonobranchiate :: Siphonobranchiate (a.) Having a siphon, or siphons, to convey water to the gills; belonging or pertaining to the Siphonobranchiata..

Siphonostomata :: Siphonostomata (n. pl.) An artificial division of gastropods including those that have siphonostomatous shells.

Siphonarid :: Siphonarid (n.) Any one of numerous species of limpet-shaped pulmonate gastropods of the genus Siphonaria. They cling to rocks between high and low water marks and have both lunglike organs and gills.

Porpita :: Porpita (n.) A genus of bright-colored Siphonophora found floating in the warmer parts of the ocean. The individuals are round and disk-shaped, with a large zooid in the center of the under side, surrounded by smaller nutritive and reproductive zooids, and by slender dactylozooids near the margin. The disk contains a central float, or pneumatocyst..

Siphonostomatous :: Siphonostomatous (a.) Having the front edge of the aperture of the shell prolonged in the shape of a channel for the protection of the siphon; -- said of certain gastropods.

Gynophore :: Gynophore (n.) One of the branches bearing the female gonophores, in certain Siphonophora..

Tube-shell :: Tube-shell (n.) Any bivalve mollusk which secretes a shelly tube around its siphon, as the watering-shell..

Nectostem :: Nectostem (n.) That portion of the axis which bears the nectocalyces in the Siphonophora.

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