donkey engine
小型輔助發動機,小型機車
doc·tor n.
1. A teacher; one skilled in a profession, or branch of knowledge; a learned man. [Obs.]
One of the doctors of Italy, Nicholas Macciavel. -- Bacon.
2. An academical title, originally meaning a man so well versed in his department as to be qualified to teach it. Hence: One who has taken the highest degree conferred by a university or college, or has received a diploma of the highest degree; as, a doctor of divinity, of law, of medicine, of music, or of philosophy. Such diplomas may confer an honorary title only.
3. One duly licensed to practice medicine; a member of the medical profession; a physician.
By medicine life may be prolonged, yet death
Will seize the doctor too. -- Shak.
4. Any mechanical contrivance intended to remedy a difficulty or serve some purpose in an exigency; as, the doctor of a calico-printing machine, which is a knife to remove superfluous coloring matter; the doctor, or auxiliary engine, called also donkey engine.
5. Zool. The friar skate. [Prov. Eng.]
Doctors' Commons. See under Commons.
Doctor's stuff, physic, medicine. --G. Eliot.
Doctor fish Zool., any fish of the genus Acanthurus; the surgeon fish; -- so called from a sharp lancetlike spine on each side of the tail. Also called barber fish. See Surgeon fish.
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Don·key n.; pl. Donkeys
1. An ass; or (less frequently) a mule.
2. A stupid or obstinate fellow; an ass.
Donkey engine, a small auxiliary engine not used for propelling, but for pumping water into the boilers, raising heavy weights, and like purposes.
Donkey pump, a steam pump for feeding boilers, extinguishing fire, etc.; -- usually an auxiliary.
Donkey's eye Bot., the large round seed of the Mucuna pruriens, a tropical leguminous plant.
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donkey engine
n 1: a locomotive for switching rolling stock in a railroad yard
[syn: switch engine]
2: (nautical) a small engine (as one used on board ships to
operate a windlass) [syn: auxiliary engine]