Occludens

Part of speech: noun

Definitions

1. A term used in anatomy to refer to structures that close off or obstruct passageways or spaces
2. Denoting mechanisms in biological systems that inhibit or prevent the flow of fluids or materials
3. Referring to elements that bring things together by sealing or blocking openings, often found in medical contexts

Etymology: Occludens is the Latin present participle of "occludere," meaning "to shut up" or "close off." The verb combines "ob-," meaning "against" or "over," with "claudere," "to close." That same root gives English "include," "conclude," and "close." In anatomy, the participle is used adjectivally, most famously in "zonula occludens," or "occluding zone." This is the tight junction, a belt-like seal where neighboring cells press together so tightly that fluid and molecules cannot slip between them.

Synonyms: blockers, closers, obstructors, sealers, barriers

Antonyms: openers, starters, unblockers