The Collaborative International Dictionary
Boniness \Bon"i*ness\, n. The condition or quality of being bony.
Wiktionary
n. the property or degree of being bony
Usage examples of "boniness".
Her face was thin to the point of boniness, but it was of an aristocratic cast.
The skinning back of the hair served to emphasize the boniness of her face.
Hudson was within shouting distance of fifty, thin to the point of boniness, with a sharp nose and a sharp tongue and a refined voice.
Her strong features bore an unfortunate resemblance to a horse, but in the Parisian way she made the most of her best features, her eyes, and after one got to know her, one saw only her nature and didn't think of the long boniness of her face.
Through the smell of vomit and night sweat and the poison of alcohol and the boniness of his shoulder and the crab of cancer snapping at the delicate pink air sacs of his lungs, through and for all this, I hugged him and he me.