What does "turtledove" mean?

Turtledove: (Zoöl.) Any one of several species of pigeons more or less resembling the true turtledoves, as the American mourning dove (see under Dove), and the Australian turtledove (Stictopelia cuneata). Note: The turtledove of the Scriptures is probably Turtur risorius, a species which is still plentiful in Egypt and other Eastern countries. It is closely allied to the European turtledove.