Musca

Part of speech: noun (n.)

1. A genus of dipterous insects, including the common house fly, and numerous allied species.

2. A small constellation situated between the Southern Cross and the Pole. Muscæ volitantes (. Etym: [L., flying flies.] (Med.) Specks or filaments apparently seen moving or glinding about in the field of vision. Their appearance is often a symptom of disease of the eye, or of disorder of the nervous system.