The Collaborative International Dictionary
Pigeon-breasted \Pi"geon-breast`ed\, a. Having a breast like a pigeon, -- the sternum being so prominent as to constitute a deformity; chicken-breasted.
Wiktionary
a. Having a breast like a pigeon's, the sternum being so prominent as to constitute a deformity.
WordNet
adj. having a chest deformity marked by a projecting breastbone caused by infantile rickets [syn: chicken-breasted]
Usage examples of "pigeon-breasted".
Clear maternal eyes, neck concealed beneath layers of chin, gray hair done up in a bun, with wisps that had escaped the net chignon, pigeon-breasted, plump forearms with deeply dimpled elbows, wearing a silk dress of purple paisley.
She's short, pigeon-breasted, and the red portion of her red hair is dyed to a hue somewhere between cinnabar and burnt ocher.