Definition of "axilla" []

• The armpit. (noun)
• A body part analogous to the armpit, such as the hollow under a bird's wing. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The axilla is a pyramidal space, situated between the upper lateral part of the chest and the medial side of the arm."
• "One or two small branches supplying the anterior fold of the axilla are the only vessels divided, and may not even require ligature, unless, indeed, from necrosis, or to remove a tumour,"
• "A doctor writes, The hair, face, axilla, and groin usually harbor the greatest number of bacteria."