photobeam en · NOUN
Etymology
Etymology tree Proto-Indo-European *bʰeh₂- Proto-Indo-European *-os Proto-Indo-European *bʰéh₂os Proto-Hellenic *pʰáwos Ancient Greek φᾰ́ος (phắos) Ancient Greek φῶς (phôs) Ancient Greek φωτο- (phōto-)der. English photo- Proto-Germanic *bagmaz? Proto-West Germanic *baum Old English bēam Middle English bem English beam English photobeam From photo- + beam.
Meanings
- A beam of light whose interruption triggers a warning or a mechanism (such as a door).
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| photobeams | Number=Plur | lexicographic | |
| photo beam | alternative | lexicographic |