Auricle - auricula, diminutive of auris, ear.⏎
Acetabulum - acteum, vinegar + abrum, holder. Small cup for vinegar, hence any small cup.⏎
Alveolus (alveolar) - alveolus, small compartment.⏎
Arytenoid - arytaina, pitcher; the two cartilages, with the gap between them, look like the spout of a pitcher.⏎
Arcuate - arcus, bow.⏎