Axilla - axilla, armpit.⏎
Atlas - Atlas, mythical figure; Atlas supports the world on his shoulders.⏎
Appendix - ad, toward; pendere, to hang. Hence appendage.⏎
Acetabulum - acteum, vinegar + abrum, holder. Small cup for vinegar, hence any small cup.⏎
Ampulla - ampulla, flask.⏎