Definition of arachnoid in English:

arachnoid

Line breaks: arach|noid
Pronunciation: /əˈraknɔɪd
 
/

adjective

  • Like a spider or arachnid: intelligent arachnoid killing machines
    More example sentences
    • Watching the erstwhile nerd get used to his muscular new body and powers - accidentally firing off webs and finding things sticking to his arachnoid hands - is one of the most engaging parts of the film.
    • Results-wise, it's difficult to extrapolate from inferred arachnoid motivations to the human mental-state.
    • Their words paralyze me like the bite of an arachnoid.

noun

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  • (also arachnoid membrane) Anatomy A fine, delicate membrane, the middle one of the three membranes or meninges that surround the brain and spinal cord, situated between the dura mater and the pia mater.
    More example sentences
    • Between the pia and arachnoid membranes is the subarachnoid space, in which the cerebrospinal fluid circulates.
    • The lining consists of three layers - dura, arachnoid and pia.
    • The surgeon opens the arachnoid membrane dorsal to the seventh and eighth nerves and continues the opening upward to the fourth nerve.

Origin

mid 18th century: from modern Latin arachnoides, from Greek arakhnoeidēs 'like a cobweb', from arakhnē 'spider'.

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