n. [Gr. tetra, four; axon, axis]
A spicule of 4 equal and similar rays meeting at equal angles; tetractine; quadriradiate; tetraxonid adj..

Online Dictionary of Invertebrate Zoology. . 2005.

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  • tetraxon — te.ˈtraksän noun ( s) Etymology: tetra + Greek axōn axle, axis more at axis : a tetraxial sponge spicule * * * tetraxon /ti trakˈson/ noun (Gr axōn, onos an axis) a sponge spicule with four axes • • • Main Entry: ↑ …   Useful english dictionary

  • tetraxon — te·trax·on …   English syllables

  • calthrop — n. [ML. calcitrapa, a four pointed weapon used to obstruct enemy movements] (PORIFERA) A tetraxon spicule with four rays more or less equal …   Dictionary of invertebrate zoology

  • clads — n. pl. [Gr. klados, branch] (PORIFERA) The three shorter rays of a tetraxon spicule, that may be forked or branched at their free ends …   Dictionary of invertebrate zoology

  • cladome — n. [Gr. klados, branch] (PORIFERA) The three short rays or cladi of a tetraxon spicule …   Dictionary of invertebrate zoology

  • cladus — n.; pl. cladi [Gr. klados, branch] (PORIFERA) Smaller branch of a tetraxon spicule; cladose adj …   Dictionary of invertebrate zoology

  • crepis — n.; pl. crepides [Gr. krepis, base] 1. (ARTHROPODA: Insecta) In Scarabaeoidea larvae, a thinly sclerotized, anteriorly concave, median cross bar of the haptolachus, usually asymmetrical and indicated by a fine line when present; a transverse,… …   Dictionary of invertebrate zoology

  • microcaltrop — n. [Gr. mikros, small; ML. calcitrapa, a four pointed weapon] (PORIFERA) A microsclere tetraxon spicule with four rays, one elongated and three short; a euaster with 4 persistent rays …   Dictionary of invertebrate zoology

  • monaene — adj. [Gr. monos, one; triaina, trident] (PORIFERA) A modified tetraxon with only one clad …   Dictionary of invertebrate zoology

  • quadriradiate — adj. [L. quadrus, fourfold; radius, ray] (PORIFERA) Having 4 rays; tetraxon, tetractine …   Dictionary of invertebrate zoology

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