Occludent

Part of speech: adjective

Definitions

1. An entity that prevents the free movement or flow within a space A substance that acts to close an opening securely An object intended to block or obstruct a passage effectively
2. A thing that stops or seals an opening to prevent access or flow
3. An item used to shut off a passage or gap to hinder movement or entry

Etymology: "Occludent" is an alternative spelling of "occludant," and the two forms share the same sense: something that blocks or closes an opening. The word is a technical adjective, used mainly in medicine and science, where it describes a substance or structure that shuts off a passage or orifice. Its roots lie in Latin. The verb "occludere" combined "ob-," meaning "against" or "over," with "claudere," "to shut" or "close." English speakers know "claudere" through a family of familiar words, such as "close," "include," and "exclude," which all carry the same core idea of shutting something in or out. The spelling variation between "occludent" and "occludant" is typical of many English adjectives derived from Latin present participles, where the ending "-ent" and "-ant" were both used. Either form is acceptable, though "occludant" appears more often in modern scientific writing.

Synonyms: obstructive