Dictionary
1arachnoid
adjective arach·noid \ə-ˈrak-ˌnȯid\
Definition of ARACHNOID
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
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First Known Use of ARACHNOID
1789
Rhymes with ARACHNOID
adenoid, alkaloid, amoeboid, aneroid, anthropoid, asteroid, Australoid, carcinoid, Caucasoid, celluloid, crystalloid, echinoid, ellipsoid, embryoid, eunuchoid, flavonoid, helicoid, hemorrhoid, hominoid, humanoid, hysteroid, metalloid, Mongoloid, myeloid, nautiloid, nucleoid, null and void, obovoid, opioid, osteoid, overjoyed, paranoid, planetoid, Polaroid, retinoid, rheumatoid, solenoid, Stalinoid, trapezoid, unalloyed, unemployed
2arachnoid
noun
Definition of ARACHNOID
: an arachnoid membrane
Origin of ARACHNOID
New Latin arachnoides, from Greek arachnoeidēs, like a cobweb, from arachnē spiderweb
First Known Use: 1804
3arachnoid
adjective
Definition of ARACHNOID
: resembling or related to the arachnids
Origin of ARACHNOID
New Latin Arachnida + English -oid
First Known Use: 1825
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