Definition: The front part of the head, including the forehead and the upper part of the skull.

Example: The doctor examined the sinciput for any signs of injury.

Definition: In geometry, it refers to a specific ratio in a right triangle, which is the length of the side opposite an acute angle divided by the length of the hypotenuse. It is also a trigonometric function that relates to angles and can be represented on a unit circle.

Example: To find the sine of a 30-degree angle, you can use the ratio of the opposite side to the hypotenuse in a right triangle.

Definition: A unique quality or condition that makes something different from others, often referring to a point in space-time with extreme gravitational effects or a mathematical point where certain properties do not apply.

Example: The concept of a black hole is often associated with a gravitational singularity.

Definition: Relating to or positioned on the left side; often used to describe left-handedness or certain types of shells in zoology.

Example: The sinistral shell of the snail spirals to the left, making it unique among its species.

Definition: Able to be submerged in water or to go down below the surface.

Example: The ship was designed to be sinkable in case of an emergency.

Definition: An object that sinks, often used as a weight for fishing lines or nets.

Example: He attached a sinker to his fishing line to help it go deeper in the water.

Definition: The action of going down below the surface of a liquid or to a lower level.

Example: The sinking of the ship was a tragic event.

Definition: To go down below the surface of a liquid or to fall to a lower level.

Example: The boat is sinking slowly in the water.

Definition: Relating to the sinoatrial node, which is a group of cells in the heart that helps control the heartbeat.

Example: The doctor explained that a sinoatrial block can affect the heart's rhythm.

Definition: To create a solid mass by heating materials together without causing them to melt completely.

Example: The metal powder will sinter when heated to a high temperature.

Definition: A solid mass created by the process of heating materials together without melting them completely, often used in geology to describe deposits formed by mineral springs.

Example: The sinter deposits around the hot springs were fascinating to observe.

Definition: To make a material, like metallic powder, stick together and form a solid mass by heating it without melting it completely.

Example: The technician will sinter the metal powder to create a strong component.

Definition: A process where small particles are joined together by applying heat and pressure without melting them completely.

Example: The sintering of metal powders is essential in creating strong and durable components.

Definition: The process of heating a material to a temperature below its melting point so that its particles adhere to each other without melting completely.

Example: The sintering of the metal powder resulted in a strong and durable component.