Exact Match:
- sinus
- any of various air-filled cavities especially in the bones of the skull
Synonyms:
- alveolation,
- alveolus,
- antrum,
- arc,
- armpit,
- basin,
- bow,
- bowl,
- catacaustic,
- catenary,
- caustic,
- cavity,
- circle,
- concave,
- concavity,
- conchoid,
- crater,
- crook,
- crypt,
- cup,
- curl,
- curve,
- depression,
- diacaustic,
- dip,
- ellipse,
- festoon,
- fold,
- follicle,
- funnel chest,
- hole,
- hollow,
- hollow shell,
- hook,
- hyperbola,
- lacuna,
- lituus,
- parabola,
- pit,
- pocket,
- punch bowl,
- scoop,
- shell,
- sink,
- socket,
- tracery,
- trough,
- vug