pear gauge
A kind of gauge for measuring the exhaustion of an air pump receiverA kind of gauge for measuring the exhaustion (creation of a vacuum) of an air pump receiver (airtight vessel from which air is pumped in order to form a vacuum).
Meaning
1 senses(historical)A kind of gauge for measuring the exhaustion (creation of a vacuum) of an air pump receiver (airtight vessel from which air is pumped in order to form a vacuum).
Origin
So called by its inventor, John Smeaton, in the mid-18th century, because it consisted inSo called by its inventor, John Smeaton, in the mid-18th century, because it consisted in part of a pear-shaped glass vessel.
Wiktionary, CC BY-SA 4.0 · source
Forms
plural: pear gauges| Singular | pear gauge |
|---|---|
| Plural | pear gauges |
regular
See also
neighbours in the dictionaryDictionary text adapted from Wiktionary (Wiktionary contributors, CC BY-SA 4.0) and Open English WordNet / Princeton WordNet (CC BY 4.0, WordNet License); shared under CC BY-SA 4.0. Example sentences and recordings are credited where they appear.