acorn tube en · NOUN
Etymology
From the resemblance of the glass cap to the cup of an acorn.
Meanings
- (historical) A kind of vacuum tube with a glass cap at one end.
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| acorn tubes | Number=Plur | lexicographic |
Dictionary
Words, grammatical forms and meanings linked to the ontology.