What is the meaning of Pitta?

Any one of a large group of bright-colored clamatorial birds belonging to Pitta, and allied genera of the family Pittidae. Most of the species are varied with three or more colors, such as blue, green, crimson, yellow, purple, and black. They are called also ground thrushes, and Old World ant thrushes; but they are not related to the true thrushes.

Source: Webster’s Revised Unabridged Dictionary (1913), via OPTED