| / English Dictionary |
ARACHNOID
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
Air-breathing arthropods characterized by simple eyes and four pairs of legs
Synonyms:
arachnid; arachnoid
Classified under:
Hypernyms ("arachnoid" is a kind of...):
arthropod (invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin)
Hyponyms (each of the following is a kind of "arachnoid"):
daddy longlegs; harvestman; Phalangium opilio (spiderlike arachnid with a small rounded body and very long thin legs)
scorpion (arachnid of warm dry regions having a long segmented tail ending in a venomous stinger)
false scorpion; pseudoscorpion (small nonvenomous arachnid resembling a tailless scorpion)
whip-scorpion; whip scorpion (nonvenomous arachnid that resembles a scorpion and that has a long thin tail without a stinger)
spider (predatory arachnid with eight legs, two poison fangs, two feelers, and usually two silk-spinning organs at the back end of the body; they spin silk to make cocoons for eggs or traps for prey)
acarine (mite or tick)
Holonyms ("arachnoid" is a member of...):
Arachnida; class Arachnida (a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings)
Derivation:
arachnoid (relating to or resembling a member of the class Arachnida)
Sense 2
Meaning:
The middle of the 3 meninges
Synonyms:
arachnoid; arachnoid membrane
Classified under:
Hypernyms ("arachnoid" is a kind of...):
meninges; meninx (a membrane (one of 3) that envelops the brain and spinal cord)
Holonyms ("arachnoid" is a part of...):
leptomeninges (the two innermost layers of the meninges; cerebrospinal fluid circulates between these innermost layers)
II. (adjective)
Sense 1
Meaning:
Relating to or resembling a member of the class Arachnida
Synonyms:
arachnidian; arachnoid; spiderlike; spiderly; spidery
Classified under:
Relational adjectives (pertainyms)
Domain category:
zoological science; zoology (the branch of biology that studies animals)
Pertainym:
class Arachnida (a large class of arthropods including spiders and ticks and scorpions and daddy longlegs; have four pairs of walking legs and no wings)
Derivation:
arachnoid (air-breathing arthropods characterized by simple eyes and four pairs of legs)
Context examples:
An intracranial or spinal cyst which contains fluid and is composed of arachnoid cells.
(Arachnoid Cyst, NCI Thesaurus)
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