I would assume you mean the tricuspid valve in the heart? Most other blood vessel valves are described as "semi-lunar", meaning they look like a half-moon, have two parts and when they close they completely block the vessel they're in. The tricuspid valve in the heart is composed of three pieces, so they would not be shaped like a half-moon.
Teeth
The Ulna
The human Body cell is round. Unlike plants, that are cube shaped.
Eyeballs are not actually perfectly round objects in an organism's body. Eyeballs are rounded objects that are shaped like ovals.
They are shaped roughly like the fists of an adult male and are located in the midsection of the body close to one's back.
It actually looks more like a triangle.
This is the valve of the vena cava inferior and the right atrium, also known as the valvula venae cavae inferioris. It is shaped like a half moon.
A Lute
It sounds like you are having problems with the transmission's valve body or your brakes are locked up. This problem is common on Chevy 350 turbo transmissions. Inside of the transmissions oil pan there is a valve near the edge of the case that has a S-shaped linkage. This S-shaped linkage can slip off the valve it controls and the transmission will feel like it goes into gear but not move the vehicle.
The body part shaped like a wedge is your incisors ( the kind that look like shrake teeth) !
the stomach of a toad is shaped like a J
half of a clock
Because there are crescent shaped, like half moons :)
Teeth
pancreas
it is a piece of pizza or half a piece of toast. It is shaped like that because i cut it that way. ChaCha Again!
they have streamlined shaped body like structure.