Dictionary Definition:
Bhaginī (f.) [Epic Sk. bhaginī] a sister J vi.32. The popular etym. of bh. as given at VbhA 108 is the same as that for bhātar, viz. "bhagatī ti bh." -- Cpd. bhagini -- māla a "sister garland" (?) N. of a tree J vi.270 (=upari -- bhaddaka).