crotch

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. The angle or region of the angle formed by the junction of two parts or members, such as two branches or legs.
2. n. The area on a pair of pants, underpants, or shorts where the two leg panels are sewn together.
3. n. A piece of material sewn into a pair of pants, underpants, or shorts that joins the legs.
4. n. The fork of a pole or other support.

Century Dictionary and Cyclopedia

1. n. A fork or forking; a point or line of divergence or parting, as of two legs or branches: as, the crotch of a tree (the point of separation of the main stem into two parts); a piece of timber with a crotch.
2. n. A shepherd's crook.
3. n. Nautical, same as crutch, 3 .
4. n. In billiards, a space, generally 4½ inches square, at a corner of the table.
5. In logging, to cut notches on opposite sides of (a log) near the end, into which dogs are fastened.

Wiktionary

1. n. The area where something forks or branches, a ramification takes place.
2. n. The (ventral) area of a person’s body where the legs fork from the trunk
3. n. The male genitalia.

GNU Webster's 1913

1. n. The angle formed by the parting of two legs or branches; a fork; the point where a trunk divides. the space on the human torso between the two legs; also, the corresponding part between the legs of a pair of pants, which is in contact with the crotch of the wearer.
2. n. A stanchion or post of wood or iron, with two arms for supporting a boom, spare yards, etc.; -- called also crane and crutch.
3. n. In the three-ball carom game, a small space at each corner of the table. See Crotched, below.
4. v. To provide with a crotch; to give the form of a crotch to.
5. v. To notch (a log) on opposite sides to provide a grip for the dogs in hauling.

WordNet 3.0

1. n. the region of the angle formed by the junction of two branches
2. n. external sex organ
3. n. the angle formed by the inner sides of the legs where they join the human trunk