A class of arthropods in the subphylum Chelicerata, consisting of spiders, scorpions, harvestmen, mites, ticks, and allies. [G. arachne, spider]

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Arach·ni·da ə-'rak-nəd-ə n pl a large class of arthropods that are mostly air-breathing by means of trachea or book lungs, that include the spiders and scorpions, mites, and ticks, and that have a segmented body divided into two regions of which the anterior bears four pairs of legs but no antennae
arach·nid -nəd adj or n

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Arach·ni·da (ə-rakґnĭ-də) [Gr. arachnē spider] a class of the Arthropoda; orders include Araneae (the spiders), Acarina (the ticks and mites), and Scorpionida (the scorpions).

Medical dictionary. 2011.

Look at other dictionaries:

  • Arachnida — Saltar a navegación, búsqueda ? Arácnidos Scorpio maurus …   Wikipedia Español

  • Arachnida — A*rach ni*da, n. pl. [NL., fr. Gr. ? spider.] (Zo[ o]l.) One of the classes of Arthropoda. See Illustration in Appendix. [1913 Webster] Note: They have four pairs of legs, no antenn[ae] nor wings, a pair of mandibles, and one pair of maxill[ae]… …   The Collaborative International Dictionary of English

  • Arachnida — Arachnida, Spinnentiere, ca. 37000 beschriebene, fast nur landlebende und räuberische Arten umfassende Klasse der ⇒ Chelicerata. Die Extremitäten sind auf das Prosoma beschränkt, werden jedoch auch am Opisthosoma noch embryonal angelegt. Die… …   Deutsch wörterbuch der biologie

  • Arachnida — Arachnides …   Wikipédia en Français

  • Arachnida — Spinnentiere Vierfleckkreuzspinne Systematik Unterabteilung: Bilateria ohne Rang …   Deutsch Wikipedia

  • Arachnida — noun a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings • Syn: ↑class Arachnida • Derivationally related forms: ↑arachnidian • Hypernyms: ↑class • Member Holonyms …   Useful english dictionary

  • Arachnida — …   Википедия

  • Arachnida — См. arachnid …   Dictionary of invertebrate zoology

  • Arachnida — Arạchnida   Plural, die Spinnentiere im engeren Sinn …   Universal-Lexikon

  • arachnida — n. class of spiders, class of arachnids (Zoology) …   English contemporary dictionary

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