Found 1 items, similar to Pole of a lens.
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Definition: Pole of a lens
, n. [As. p[=a]l, L. palus, akin to pangere to make
fast. Cf. Pale
a stake, Pact
1. A long, slender piece of wood; a tall, slender piece of
timber; the stem of a small tree whose branches have been
removed; as, specifically:
(a) A carriage pole, a wooden bar extending from the front
axle of a carriage between the wheel horses, by which
the carriage is guided and held back.
(b) A flag pole, a pole on which a flag is supported.
(c) A Maypole. See Maypole
(d) A barber's pole, a pole painted in stripes, used as a
sign by barbers and hairdressers.
(e) A pole on which climbing beans, hops, or other vines,
2. A measuring stick; also, a measure of length equal to 5?
yards, or a square measure equal to 30? square yards; a
rod; a perch. --Bacon.
(Bot.), any kind of bean which is customarily
trained on poles, as the scarlet runner or the Lima bean.
(Zo["o]l.), a large deep-water flounder
), native of the northern
coasts of Europe and America, and much esteemed as a food
fish; -- called also craig flounder
, and pole fluke
, a simple form of lathe, or a substitute for a
lathe, in which the work is turned by means of a cord
passing around it, one end being fastened to the treadle,
and the other to an elastic pole above.
(Naut.), a mast formed from a single piece or
from a single tree.
Pole of a lens
(Opt.), the point where the principal axis
meets the surface.
(Arch.), a horizontal timber resting on the
tiebeams of a roof and receiving the ends of the rafters.
It differs from the plate in not resting on the wall.