| Arachnida |
[ah-RACK-nid-ah] one of the classes of arthropods which includes the mites, ticks, spiders, scorpions, and harvestmen.
Ãâó: members.aol.com/YESedu/glossary.html
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| arachnophobia |
[ah-rack-no-FO-bee-ah] an unrealistic (irrational) fear of spiders.
Ãâó: members.aol.com/YESedu/glossary.html
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| Araneida |
[ah-RAN-ee-dah] an order of the class Arachnida, comprised of the spiders, characterized by two body parts (cephalothorax and abdomen), eight legs, and a pair of fangs (chelicerae).
Ãâó: members.aol.com/YESedu/glossary.html
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| arachnoid membrane |
The middle of three membranes protecting the brain and spinal cord.
Ãâó: members.tripod.com/~cripkorner/glossary.html
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| arachnoiditis |
Inflammation and scarring of the membranes covering the spinal cord.
Ãâó: members.tripod.com/~cripkorner/glossary.html
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