spider / (inorganic chemistry) a boron structure intermediate between nido- and hypho- in degree of openness

An abnormal or irrational fear of arachnids (especially spiders).

The study of the Arachnida.

Suffering from arachnophobia.

Synonym of arachnophobe

(teratology) a condition in which the fingers and hands are abnormally long and slender

(pathology) A neuropathic disease caused by the inflammation of the arachnoid, one of the membranes that surround and protect the nerves of the spinal cord.

The study of the appearance and behavior of spiders, or the patterns of their webs (possibly related to the third meaning) for use in divination.

One who practices arachnomancy.

plural of arachnomancer