flicker

Concise Oxford English Dictionary © 2008 Oxford University Press:
flicker1

▶verb

• 1 shine or burn unsteadily and fitfully.

• 2 (of a feeling) be briefly perceptible.

• 3 make small, quick movements.

▶noun an instance of flickering.

– derivatives
flickering adjective & noun.

– origin OE flicorian, flycerian ‘to flutter’, prob. of Gmc origin.

Concise Oxford English Dictionary © 2008 Oxford University Press:
flicker2

▶noun an American woodpecker that often feeds on ants on the ground. [Colaptes auratus (common or northern flicker) and related species.]

– origin C19: imitative of its call.