sinus /sīˈnəs/

1. An air-filled cavity in the bones of the skull, connecting with the nose
2. A narrow cavity through which pus is discharged
3. A cavity
4. An indentation
5. A notch between two lobes in a leaf (botany)

sinupallˈial /sī-nū-/ or sinupallˈiate adjective

(of certain bivalve molluscs) having an indented pallial line for the retraction and expansion of the pallial siphons

sinusīˈtis or sinuīˈtis /sī-nū-/ noun

Inflammation of a sinus, esp one in the skull communicating with the nose

sinusoid /sīˈnə-soid/ noun

1. The curve of sines (y=asinx)
2. A small blood vessel in certain organs, such as the liver, heart, etc

Similar to or referring to a sinus

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