Parauterine organ see paruterine organ

paraxial a. [Gr. para, beside; L. axis, axle] 1. To move parallel to the body axis. 2. par-axial (ARTHRO: Chelicerata) In spiders, pertaining to chelicerae with the paturon projecting forward with the fangs moving in a downward direction. see di-axial.

paraxial organs (ARTHRO: Chelicerata) Special gland pockets that produce the spermatophores of male Scorpions.

paraxon n. [Gr. para, beside; axon, axle] The collateral branch of an axon.

Parazoa n. [Gr. para, beside; zoon, animal] A subkingdom containing Porifera; the sponges.

parazoeal a. [Gr. para, beside; zoe, life] (ARTHRO: Crustacea) In Bathynellacea, postembryological development (larval) phase, quite often completed in the egg.

parcidentate a. [L. parcus, sparing; dens, tooth] Having few teeth.

parecium n. [Gr. para, beside; oikos, house] (ARTHRO: In-secta) Air space surrounding a fungus garden in the nest of Isoptera.

parenchyma n. [Gr. para, beside; NL. enchyma, type of cell tissue] Undifferentiated tissue between organs in various invertebrates. parenchymatous a.

parenchymalia n.pl. [Gr. para, beside; NL. enchyma, type of cell tissue] (PORIF: Hexactinellida) Spicules scattered throughout the parenchyma, consisting of hexactines, di-actines, various hexasters and sometimes amphidisks.

parenchymula, parenchymella n. [Gr. para, beside; NL. enchyma, type of cell tissue] (porif) A solid, ciliated larva; a stereogastrula.

paria n.; pl. -ae [Gr. pareion, cheek] (ARTHRO: Insecta) In scarabaeoid larvae, the lateral paired region of the epipharynx from the clithrum, or epizygum and haptome-rum to the dexiotorma or laetorma.

paries n.; pl. parietes [L. paries, wall] 1. A wall; any wall of a part, cavity or hollow organ. 2. (ARTHRO: Crustacea) The median part of every compartmental plate of sessile Cir-ripedia.

parietal a. [L. paries, wall] 1. (ARTHRO: Crustacea) Of or pertaining to paries. 2. (ARTHRO: Insecta) Referring to the dorsal sclerites of the cranium, between the frontal and occipital areas; the adfrontal area or plate. 3. (MOLL: Gastropoda) Pertaining to the inside wall of a univalve within the aperture, the broader upper part of the inner lip.

parietal callus (MOLL: Gastropoda) A thickening of the inner lip.

parietal fold (MOLL: Gastropoda) A spiral ridge on the parietal region projecting into the interior of the shell.

parietal lip (MOLL: Gastropoda) A part of the inner lip on the parietal region.

parietal muscles (BRYO) Generally multiple, bilaterally paired muscles that insert on the front wall or floor of the ascus; usually functioning in the hydrostatic system.

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