English to English Dictionary

Sinus

A cavity or hollow space within a solid object, particularly in anatomy.

Sinus Infection

A condition characterized by inflammation of the sinuses, often due to infection.

Sinusitis

Inflammation of the mucous membranes that line the sinuses.

Sinusoidal

Relating to or resembling a sine wave, especially in terms of periodic oscillation.

Sipe

A narrow groove or channel cut into the tread of a tire or shoe to improve traction on wet surfaces.

Sirenian

Any of an order (Sirenia) of large, herbivorous, aquatic placental mammals that includes the manatees and dugongs.

Sisal

A strong, coarse fiber obtained from the leaves of the agave plant, used for making rope, twine, and various textiles.

Sister

A female and a male/female who share the same parents or one parent.

Sister-in-law

The sister of one's spouse.

Sit

To rest in a position where the weight is supported by the buttocks.

Sit-on-your-hands

To refrain from taking action or to remain passive in a situation.

Sitcom

A television program that features a fixed set of characters in a humorous situation.