arachnoid

Adjective
  1. referred to in: zoological science, zoology - the branch of biology that studies animals
    same as: arachnidian, spiderlike, spiderly, spidery
Noun
  1. is a type of: meninges, meninx - a membrane (one of 3) that envelops the brain and spinal cord
    is a part of: leptomeninges - the two innermost layers of the meninges; cerebrospinal fluid circulates between these innermost layers
    same as: arachnoid membrane
  2. is a type of: arthropod - invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
    subtypes:
    • 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
    belongs to: 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
    same as: arachnid

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