Ambulacra
Ambulacrum Am`bu*la"crum, n.; pl. {Ambulacra}. [L., an alley or covered way.] (Zo["o]l.) (a) One of the radical zones of echinoderms, along which run the principal nerves, blood vessels, and water tubes. These zones usually bear rows of locomotive suckers or tentacles, which protrude from regular pores. In star fishes they occupy the grooves along the under side of the rays. (b) One of the suckers on the feet of mites. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Ambulācra — (Petref.), Fühlergänge der Echiniten …   Pierer's Universal-Lexikon

  • ambulacra — plural of ambulacrum …   Useful english dictionary

  • Dinodiplura ambulacra — †Dinodiplura ambulacra …   Wikipédia en Français

  • Blastoid — Taxobox name = Blastoids fossil range = Ordovician Permian image caption = Blastoid fossils ( thecae ) attached to matrix. regnum = Animalia phylum = Echinodermata subphylum = Blastozoa classis = Blastoidea classis authority = Say, 1825… …   Wikipedia

  • echinoderm — /i kuy neuh derrm , ek euh neuh /, n. any marine animal of the invertebrate phylum Echinodermata, having a radiating arrangement of parts and a body wall stiffened by calcareous pieces that may protrude as spines and including the starfishes, sea …   Universalium

  • Bivium — Biv i*um, n. [L., a place with two ways. See {Bivious}.] (Zo[ o]l.) One side of an echinoderm, including a pair of ambulacra, in distinction from the opposite side (trivium), which includes three ambulacra. [1913 Webster] …   The Collaborative International Dictionary of English

  • Edrioasteroidea — Taxobox name = Edrioasteroids fossil range = Ediacaran Permian image caption = An unidentified edrioasteroid regnum = Animalia phylum = Echinodermata subphylum = Pelmatozoa classis = Edrioasteroidea subdivision ranks = Genera subdivision = *?… …   Wikipedia

  • Adambulacral — Ad am*bu*la cral, a. [L. ad + E. ambulacral.] (Zo[ o]l.) Next to the ambulacra; as, the adambulacral ossicles of the starfish. [1913 Webster] …   The Collaborative International Dictionary of English

  • Ambulacral — Am bu*la cral, a. (Zo[ o]l.) Of or pertaining to ambulacra; avenuelike; as, the ambulacral ossicles, plates, spines, and suckers of echinoderms. [1913 Webster] …   The Collaborative International Dictionary of English

  • Ambulacriform — Am bu*la cri*form, a. [Ambulacrum + form] (Zo[ o]l.) Having the form of ambulacra. [1913 Webster] || …   The Collaborative International Dictionary of English

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