| 释义 |
dou·bler
I. \ˈdu̇blə(r)\ noun
(-s)
Etymology: Middle English dobler, from Middle French doblier, doublier, from doblier, doublier, adjective, double, from Late Latin duplarius, from Latin duplus double + -arius -ary — more at double
dialect England : a large plate or bowl
II. \ˈdəb(ə)lə(r)\ noun
(-s)
Etymology: double (III) + -er
1. : one that doubles: as
a. : a textile worker who doubles thread or folds cloth usually by machine
b. : a textile machine for doubling yarn
2.
a. : an instrument for so increasing a small initial quantity of electricity that it may be detected by the electroscope or the appearance of sparks
b. : an amplifier circuit whose output has twice the frequency of the input when the plate circuit is tuned to oscillate twice to each cycle of grid potential
< frequency doubler >
c. : a rectifier circuit in which each blocked half cycle of input voltage charges a capacitor so connected as to add its discharge to the next forward cycle and thus double the rectified output voltage
< voltage doubler >
3. : a part of a distilling apparatus for intercepting the heavier fractions and returning them to be redistilled
4. : either of a pair of mating crabs
5. : a usually fabric interlining that reinforces the lining of a shoe at vamp and tip |