butt hinge

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A hinge composed of two plates attached to abutting surfaces of a door and door jamb and joined by a pin.

Century Dictionary and Cyclopedia

1. n. Same as butt, 4.

Wiktionary

1. n. carpentry A kind of hinge used in hanging doors, lid, covers, etc.; so named because fastened on the edge of the door, which butts against the frame, stop molding, and casing, instead of on its face, like the strap hinge; also called butt.

GNU Webster's 1913

1. See 1st butt, 10.

WordNet 3.0

1. n. a hinge mortised flush into the edge of the door and jamb