from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various arthropods of the class Arachnida, such as spiders, scorpions, mites, and ticks, characterized by four pairs of segmented legs and a body that is divided into two regions, the cephalothorax and the abdomen. Also called arachnoid.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of the eight-legged creatures, including spiders and scorpions, of the class Arachnida
from the GNU version of the Collaborative International Dictionary of English
- n. An arachnidan.
from The Century Dictionary and Cyclopedia
- n. One of the Arachnida; an arachnidan.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. air-breathing arthropods characterized by simple eyes and four pairs of legs
From New Latin Arachnida, class name, from Greek arakhnē, spider.(American Heritage® Dictionary of the English Language, Fourth Edition)
French arachnide (1809, Lamarck), from Ancient Greek ἀράχνη ("spider"). (Wiktionary)