A birth in which the baby comes through the birth canal posterior (buttocks), feet, or knees first, instead of the more usual position of headfirst.

plural of breech birth

(of a gun) Such that ammunition is loaded at the rear of the bore.

(rare) Alternative form of bear's breech

Any of two common species of acanthus, Acanthus mollis and, less frequently, Acanthus spinosus. / Any species of the genus Acanthus. / (rare) A species of hogweed, Heracleum sphondylium

Alternative form of breech birth

plural of breech pin

A breech pin.

A strong metal plug screwed into the breech of a musket or other firearm, to close the bottom of the bore.

plural of breech screw