anatomy (n.) Look up anatomy at Dictionary.com
late 14c., "study or knowledge of the structure and function of the human body" (learned by dissection); c. 1400, "anatomical structure," from Old French anatomie and directly from Late Latin anatomia, from late Greek anatomia for classical anatome "dissection," literally "a cutting up," from ana "up" (see ana-) + temnein "to cut" (from PIE root *tem- "to cut").

"Dissection" (1540s), "mummy" (1580s), and "skeleton" (1590s) were primary senses of this word in Shakespeare's day; meaning "the science of the structure of organized bodies" predominated from 17c. Of persons, "the body," from 1590s. Often misdivided as an atomy or a natomy (see N).
The scyence of the Nathomy is nedefull and necessarye to the Cyrurgyen [1541]