ETYMOLOGY
from a first element of uncertain origin (see note below) + cock (mature male of the domestic chicken)
EXAMPLE (for n. 1.)
“…Lear.
Death traytor, nothing could haue subdued nature
To such a lownes, but his vnkind daughters,
Is it the fashion that discarded fathers,
Should haue thus little mercy on their flesh,
Iudicious punishment twas this flesh
Begot those Pelicane daughters.
Edg.
Pilicock sate on pelicocks hill, a lo lo lo.
Foole.
This cold night will turne vs all to fooles & madmen. …”
From: True Chronicle Historie of the Life and Death of King Lear and his three daughters
By William Shakespeare, 1608
Lexicophilia 