Toward the anterior or front part; in the direction of the front.
From Latin 'anterior' (toward the front) + adverbial suffix '-ad' (meaning toward). Medical anatomists use this suffix to create adverbs indicating direction.
Anatomists love the '-ad' suffix because it creates a whole system of direction words: 'anteriad' (toward front), 'posteriad' (toward back), 'mediad' (toward middle)—it's like compass directions for the human body.
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