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

sinusoidˈal adjective

sīnusoidˈally adverb