sealed beam

Fetched 2026-10-26 (cache).

Synonyms: sealed-beam

Antonyms: sealed-beam

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{lb|en|technology}} A type of [[electric]] [[lamp]] for producing a [[beam]] of light in which the [[filament]] is [[sealed]] inside a unit consisting of the [[reflector]] and [[lens]] so as to ensure the [[alignment]] of the beam and to protect the reflector from becoming dirty or [[tarnish]]ed.

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.