Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology 691of the choanocyte chambers. see exopinacocyte,endopinacocyte, basopinacocyte.pinacoderm, pinnacoderm n. [Gr. pinax, tablet; derma, skin](PORIF) The outer delimiting membrane layers of pinacocytes;ectosome.pinaculum n. [Gr. pinax, tablet] (ARTHRO: Insecta) Small, flator slightly raised chitinized area with one to four setae.pincers n.pl. [OF. pincier, to pinch] Any structure that resemblesthe grasping end of pincers.pinna n.; pl. pinnae [L. feather] 1. A wing or fin. 2. (ARTHRO:Insecta) The part of the trumpet of Culicidae pupae fromthe apex to an imaginary line drawn approximately perpendicularto the longitudinal axis at the proximal marginof the spiracular opening.pinnafid n. [L. pinna, feather; findare, to split] (ARTHRO: Insecta)Wings that are deeply divided, as in Thysanoptera.pinnate a. [L. pinnatus, feathered] 1. Feather or fern-like inappearance. 2. Having hairs, thorny or lateral processes onopposite sides.pinnules n.pl. [L. dim. pinna, feather] 1. (ANN: Polychaeta)The lessened lateral paddle-like parapodia. 2. (ECHINOD:Crinoidea) Short tapering, flexible lateral projections orbranches on either side of the arms.pinocytosis n. [Gr. pino, drink; kytos, container] Ingestion orabsorption of surrounding fluids by a cell, that forms avesicle by incupping of the surface membrane.pinosome n. [Gr. pino, drink; soma, body] Intracellular vesiclecontaining material taken up by pinocytosis.pinule, pinulus n. [L. dim. pinna, feather] (PORIF) A spiculeresembling a fir tree because of small spines developing onone ray, usually 5 rayed spicules.pioneer community Organisms that establish a new communityon bare ground.piping n. [L. pipare, to chirp] (ARTHRO: Insecta) In Apis, soundmade by young queens after their emergence.piptoblast n. [Gr. piptein, to fall; blastos, bud] (BRYO) An encapsulatedbud not released from parent colony.