Arachnoid A*rach"noid, n. 1. (Anat.) The arachnoid membrane. [1913 Webster]

2. (Zo["o]l.) One of the Arachnoidea. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • arachnoid — [ə rak′noid΄] adj. [ModL arachnoides < Gr arachnoeidēs, like a cobweb < arachnē, spider (see ARACHNID) + eidēs, OID] 1. Anat. designating the middle of three membranes covering the brain and the spinal cord: see DURA MATER, PIA MATER 2. Bot …   English World dictionary

  • Arachnoid — A*rach noid, a. [Gr. ? like a cobweb; ? spider, spider s web + e i^dos form.] 1. Resembling a spider s web; cobweblike. [1913 Webster] 2. (Anat.) Pertaining to a thin membrane of the brain and spinal cord, between the dura mater and pia mater.… …   The Collaborative International Dictionary of English

  • arachnoid — (adj.) cobweb like, especially of the membrane around the brain and spinal cord, 1789, from Mod.L. arachnoides, from Gk. arakhnoeides cobweb like, from arakhne cobweb (see ARACHNID (Cf. arachnid)) + oeides (see OID (Cf. oid)) …   Etymology dictionary

  • arachnoid — mater; n. the middle of the three membranes covering the brain and spinal cord (see meninges), which has a fine, almost cobweb like, texture. Between it and the pia mater within lies the subarachnoid space, containing cerebrospinal fluid and… …   The new mediacal dictionary

  • arachnoid — SYN: a. mater. [G. arachne, spider, cobweb, + eidos, resemblance] a. of brain SYN: cranial a. mater. cranial a. mater [TA] that portion of the a. that lies within the cranial cavity and surrounds the …   Medical dictionary

  • Arachnoid — The word Arachnoid means pertaining to or resembling an arachnid or spider. It may also refer to:* Arachnoid mater, one of the three layers of the meninges, a system of membranes that contain the central nervous system. * Arachnoid (astrogeology) …   Wikipedia

  • arachnoid — I. adjective Date: 1789 1. of or relating to a thin membrane of the brain and spinal cord that lies between the dura mater and the pia mater 2. covered with or composed of soft loose hairs or fibers II. noun Etymology: New Latin arachnoides, from …   New Collegiate Dictionary

  • arachnoid — /euh rak noyd/, adj. 1. resembling a spider s web. 2. of or belonging to the arachnids. 3. Anat. of or pertaining to the arachnoid membrane. 4. Bot. formed of or covered with long, delicate hairs or fibers. n. 5. an arachnid. 6. Anat. the serous… …   Universalium

  • arachnoid — 1. adjective a) Relating to spiders. b) Relating to or resembling spider webs. 2. noun a) An arachnid b) The arachnoid mater, the middle layer of t …   Wiktionary

  • arachnoid — [ə raknɔɪd] adjective like a spider or arachnid. noun (also arachnoid membrane) Anatomy the fine middle membrane of the three surrounding the brain and spinal cord, situated between the dura mater and the pia mater. Origin C18: from mod. L.… …   English new terms dictionary

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