Goatsucker \Goat"suck`er\, n. (Zool.)
One of several species of insectivorous birds, belonging to
{Caprimulgus} and allied genera, esp. the European species
({Caprimulgus Europ[ae]us}); -- so called from the mistaken
notion that it sucks goats. The European species is also
{goat-milker}, {goat owl}, {goat chaffer}, {fern owl}, {night
hawk}, {nightjar}, {night churr}, {churr-owl}, {gnat hawk},
and {dorhawk}.
[1913 Webster]