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关于《朗文当代高级英语辞典》
Date:
1400-1500
Language:
Latin
Origin:
valva
'part of a door'
valve
noun
valve
[
countable
]
1
TEM
a part of a tube or pipe that opens and shuts like a door to control the flow of liquid, gas, air etc passing through it
:
heart valves
2
APM
the part on a
trumpet
or similar musical instrument that you press to change the sound of the note
3
British English
TEE
a closed glass tube used to control the flow of electricity in old radios, televisions etc
[=
vacuum tube
American English
]
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