Spoon see bouton flabellum

sporadic a. [Gr. sporas, scattered] Occasional occurrence.

sporoblast n. [Gr. spora, seed; blastos, bud] A cell mass that will develop into a sporocyst within an oocyst.

sporocyst n. [Gr. spora, seed; kystis, bladder] 1. A stage of sporozoan development, usually within a protective envelope; the oocyst. 2. (platy: Trematoda) An asexual stage of development.

sporogony n. [Gr. spora, seed; gonos, offspring] The multiple fission of a zygote; a sporont.

sporont n. [Gr. spora, seed; on, a being] An undifferentiated cell mass within an oocyst.

sporosac n. [Gr. spora, seed; sakkos, bag] (CNID: Hydrozoa) In Siphonophora, gonophores held in place and not released into the water during larval development.

sporozoite n. [Gr. spora, seed; zoon, animal] The stage of development of a sporoblast which has divided and exited the oocyst into the hemocoel and migration begins; the malarial stage found in the salivary glands of insects.

spout n. [ME. spouten, to vomit] (MOLL: Gastropoda) A rudimentary siphonal canal.

spraing n. [Scot. of Scand. origin, sprang, stripe] A bright streak or stripe.

spring tide A series of tides with a relatively large tidal range, occurring at or soon after the new or the full moon. see neap.

spur n. [A.S. spora, spur] 1. A movable spine-like process. 2. (ARTHRO: Crustacea) a. In Cirripedia, a pendent-like projection from the basal margin of the tergum. b. In Ostra-coda, a flattened spine-like projection in some dimorphic genera.

spur fasciole (ARTHRO: Crustacea) In Cirripedia, a slight depression on the outer surface of the tergum to the apex in line with the spur.

spur furrow (ARTHRO: Crustacea) In Cirripedia, a groove on the outer surface of the tergum to the apex in line with the spur.

spurious a. [L. spurius, false] Morphologically untrue; false.

spurious claw (ARTHRO) A false claw; a claw-like stout bristle.

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