Resembling beads; small, round, and gleaming. / (of eyes or a look) Bright and penetrating. / Covered or ornamented with, or as if with, beads. / Characterized by beads.

The state or quality of being beady.

(slang) eyes

Having small, bright eyes. / Giving a suspicious and alert look.

plural of beady eye

(literally) A small, bright eye. / A figurative means of paying watchful attention towards someone or something.