Moving or directed toward the outside; in anatomy, moving away from the center or interior of the body.
From Greek ektos 'outside' + Latin -ad suffix meaning 'toward.' Used primarily in medical and anatomical terminology to describe directional movement.
Anatomists use ectad as the opposite of entad (toward the inside)—it's part of a beautiful Latin-Greek hybrid vocabulary that lets doctors precisely describe which direction tissues are moving, and these pairs of opposite words are like the compass directions of the human body.
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