SADDLEBACK (2)

Sad″dle‐back′, n. 1. 1. Anything saddle-backed; esp., a hill or ridge having a concave outline at the top.
2. 2. (Zoöl.) (a) The harp seal. (b) The great blackbacked gull (Larus marinus). (c) The larva of a bombycid moth (Empretia stimulea) which has a large, bright green, saddle-shaped patch of color on the back.