The breastbone of this Whale is a roughly-triangular bone made up of three pieces.
I've 'eard o' men dying when you 'it 'em fair on the breastbone.
Be especially careful not to break the gall-bag, which is near the upper part of the breastbone, and attached to the liver.
He hit Ling on the lower end of the breastbone, where his belly would be softest.
He could hear the other's breathing, long and slow; the breathing of a man with a hundredweight or so on the breastbone.
Then lay them on a board and roll with a rolling-pin to flatten the breastbone.
He glanced quickly around as he slashed another Saracen from pate to breastbone.
For answer Tom Rochford pressed his hand to his breastbone and hiccupped.
Cut off the feet of a chicken, break the breastbone flat, but be careful not to break the skin.
The rib cage includes the breastbone and twelve pairs of ribs.
breastbone breast·bone (brěst'bōn')