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Webster 1913 Edition

Adj.

(Anat.)

Situated under the axilla, or armpit.

(Bot.)

Placed under the axil, or angle formed by the branch of a plant with the stem, or a leaf with the branch.

Adj.

[L., the arm-pit.] Placed under the axil or angle formed by the branch of a plant with the stem, or by a leaf with the branch.

subaxillary ‎(not comparable)

(anatomy) Situated under the axilla, or armpit.
(botany) Placed under the axil, or angle formed by the branch of a plant with the stem, or a leaf with the branch.