ビームbiimu

1. nounbeam

• Synonym梁はりNeutralA horizontal beam supporting the roof etc.; the everyday word in speech and construction. 「ビーム」 also means a beam but is mostly for light and rays.
• Synonym光線こうせんNeutralA ray of light — the path light travels; the broadest word for ordinary light. 「ビーム」 is light or particles focused into a bundle.
• Related光芒こうぼうWrittenWritten/formal prose: a beam of light trailing like a tail, mostly in literary description; 「ビーム」 covers light beams and rays, and structural beams too.
• Related光束こうそくNeutralPhysics term for a bundle of light rays, also luminous flux; 「ビーム」 also covers electron and particle beams, and structural beams.

Use 「ビーム」 for beams of light and streams such as electron beams (「電子ビーム」). For ordinary light say 「光線」, for a structural beam 「梁」, and 「光芒」 for literary description; 「光束」 is the physics term.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. （建物たてものの）梁はり。桁けた。
2. 光線こうせん。
3. 粒子りゅうしの集団しゅうだんや波長はちょうの短みじかい波なみが、細ほそい流ながれとなって並進へいしんしたもの。粒子線りゅうしせんなど。