Sinusový

Sinusové is an adjective in Czech that literally means relating to a sinus. It is used across several disciplines to form terms describing structures or concepts associated with a sinus, and its exact form adapts to gender and number in a sentence. The word derives from the Latin sinus, meaning a cavity or hollow, and it is extended in modern usage to areas as diverse as anatomy and mathematics.

In anatomy, sinusové often refers to the paranasal sinuses, a group of air-filled cavities surrounding the nasal cavity. The main sinuses are the maxillární (maxillary), čelní (frontal), čichové/ethmoidální (ethmoidal), and dutina sphenoidální (sphenoidal). These cavities drain into the nasal passages and play roles in humidifying and warming inhaled air, lightening the skull, and contributing to voice resonance. Sinusové dutiny show considerable anatomical variation among individuals and can be involved in conditions such as sinusitis, where inflammation and obstruction affect drainage.

Outside anatomy, sinusové can describe relationships to the sine function in mathematics, for example sinusové funkce (sine functions) or sinusová vlna (sine wave). The term also appears in other fields when a structure or concept resembles a sinus or cavity, such as in cardiology with terms like sinusový uzel (sinoatrial node).

Overall, sinusové serves as a versatile descriptor in Czech, linking language to both anatomical structures and mathematical ideas through the common notion of a sinus.