‖ pileum Ornith.
(ˈpaɪlɪəm)
[L. pīleum (better pilleum), collat. form of pīleus (pilleus): see pileus]
The whole of the top of the head of a bird, comprising the frons, corona or vertex, and occiput.
| 1874 Coues Birds N.W. 457 A broad, transverse, coronal, black bar of varying width (sometimes occupying half the pileum, sometimes a mere line). Ibid. 665 Crown and long occipital crest deep glossy greenish-black. This pileum extends..to a level with the lower border of the eye. |