- any of three deep-bodied, cichlid fishes, Pterophyllum scalare, P. altum, and P. eimekei, inhabiting northern South American rivers, often kept in aquariums.
Origin of scalare
1925–30; < New Latin; Latin scālāre, neuter of scālāris scalar; from its ladderlike markings
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- another name for angelfish (def. 2)
C19: from Latin scālāris of a ladder, scalar, referring to the runglike pattern on its body