| 单词 | plunger |
| 释义 | plunger /plun"jeuhr/, n. 1. Mach. a pistonlike reciprocating part moving within the cylinder of a pump or hydraulic device. 2. Auto. a pistonlike part in the valve of a pneumatic tire. 3. Also called force cup, plumber's friend, plumber's helper. a device consisting of a handle with a rubber suction cup at one end, used as a force pump to free clogged drains and toilet traps. 4. a person or thing that plunges. 5. a reckless bettor or speculator. [1605-15; PLUNGE + -ER1] |
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