pec·to·ral branches of tho·ra·co·a·cro·mi·al ar·ter·y
[TA] branches of the thoracoacromial artery descending between and supplying the pectoralis major and minor muscles, then continuing to supply the serratus anterior muscle and, in the adult female, the upper portion of the breast. Synonym(s): rami pectorales arteriae thoracoacromialis [TA]