Arachnida

Arachnida definition - medical

A·rach·ni·da (ə-răkˈnĭ-də)

noun
A class of arthropods that includes spiders, scorpions, mites, and ticks.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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