I. əˈrakˌnȯid noun
( -s )
Etymology: New Latin arachnoides, from Greek arachnoeidēs cobweblike, from arachn- + -eidēs -oid
: a thin membrane of the brain and spinal cord that lies between the dura mater and the pia mater
II. adjective
: of or relating to the arachnoid
the arachnoid membrane
III. adjective
Etymology: arachn- + -oid
: of, relating to, or characterizing the Arachnida : like arachnids
IV. noun
( -s )
: arachnid ; broadly : any of various invertebrate animals that resemble or are related to arachnids
V. adjective
Etymology: Greek arachnoeidēs
: resembling a spider's web ; specifically : covered with or composed of soft loose hairs or fibers — used especially of plants
an arachnoid leaf