axillare

Axillare is a Latin-derived adjective meaning “of or pertaining to the axilla” or, more broadly, “of the axil.” In scientific usage, the form appears in Latinized descriptions or multilingual contexts to indicate a location related to the axilla, the armpit in humans and many mammals, or to the axil of a plant leaf.

In anatomy, axillare may be found in older texts or translations where the Latin noun axilla is used. In contemporary English-language anatomy, the term axillary is far more common for describing structures in the armpit area, such as the axillary vessels, lymph nodes, nerves, or the brachial plexus, and for noting relations to the armpit. The preference for axillary reflects standard modern terminology, while axillare may appear in scholarly works that retain Latin terminology or in historical descriptions.

In botany, axillare can describe features located at the leaf axil—the angle between a leaf stalk and the stem. Examples might include axillary buds or axillary meristems. As with anatomy, the more usual English term is axillary, with axillare appearing mainly in Latinized passages or taxonomic contexts.

Etymology traces the word to Latin axilla (armpit) with the suffix -are, forming a descriptor. Related terms include axilla, axillary, and axillaris, depending on language and field.