- an Old World titmouse, Parus caeruleus, having a cobalt-blue crown.
Origin of blue tit
First recorded in 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a common European tit, Parus caeruleus, having a blue crown, wings, and tail, yellow underparts, and a black and grey head