Both Uses

Cupid
in
Interview with the Vampire
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But she lived, she lived to put her arms around my neck and press her tiny cupid's bow to my lips and put her gleaming eye to nay eye until our lashes touched and, laughing, we reeled about the room as if to the wildest waltz.†
Part 1 *

Cupid = Roman mythology: god of love
And she was looking at me with two calm, violet eyes and a child's mouth that seemed almost obdurately soft, obdurately the cupid's bow unsullied by paint or personality; and the mouth smiled now and said, as those eyes seemed to fire: 'Yes, he's as you said he would be, and I love him already.†
Part 3

Definitions:

(1) (Cupid)
Roman mythology: god of love; a small, winged boy whose arrows make those struck fall in love
(2) (meaning too rare to warrant focus)
In earlier Greek mythology, Cupid was strikingly handsome.