From The Collaborative International Dictionary of English v.0.48 :
lookdown \look"down`\, look-down \look"-down`\, n. (Zool.)
A fish ({Selene vomer) similar to the moonfish but with eyes
high on the truncated forehead; it was also called moonfish
at one time.
Syn: Selene vomer.
[WordNet 1.5]
From The Collaborative International Dictionary of English v.0.48 :
Moonfish \Moon"fish`\, n. (Zool.)
(a) An American marine fish ({Vomer setipennis); -- called
also bluntnosed shiner, horsefish, and sunfish.
(b) A broad, thin, silvery marine fish ({Selene vomer); --
called also lookdown, and silver moonfish.
(c) The mola. See Sunfish, 1.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
lookdown
n 1: similar to moonfish but with eyes high on the truncated
forehead [syn: lookdown, lookdown fish, Selene vomer]