Automatic cut-off
Expansion Ex*pan"sion, n. [L. expansio: cf. F. expansion.] 1. The act of expanding or spreading out; the condition of being expanded; dilation; enlargement. [1913 Webster]

2. That which is expanded; expanse; extend surface; as, the expansion of a sheet or of a lake; the expansion was formed of metal. [1913 Webster]

The starred expansion of the skies. --Beattie. [1913 Webster]

3. Space through which anything is expanded; also, pure space. [1913 Webster]

Lost in expansion, void and infinite. --Blackmore. [1913 Webster]

4. (Economics & Commmerce) an increase in the production of goods and services over time, and in the volume of business transactions, generally associated with an increase in employment and an increase in the money supply. Opposite of {contraction}.

Syn: economic expansion. [1913 Webster +PJC]

5. (Math.) The developed result of an indicated operation; as, the expansion of (a + b)^{2} is a^{2} + 2ab + b^{2}. [1913 Webster]

6. (Steam Engine) The operation of steam in a cylinder after its communication with the boiler has been cut off, by which it continues to exert pressure upon the moving piston. [1913 Webster]

7. (Nav. Arch.) The enlargement of the ship mathematically from a model or drawing to the full or building size, in the process of construction. --Ham. Nav. Encyc. [1913 Webster]

Note: Expansion is also used adjectively, as in expansion joint, expansion gear, etc. [1913 Webster]

8. an enlarged or extended version of something, such as a writing or discourse; as, the journal article is an expansion of the lecture she gave. [PJC]

9. an {expansion joint}. See below. [Colloq. or jargon] [PJC]

{Expansion curve}, a curve the co["o]rdinates of which show the relation between the pressure and volume of expanding gas or vapor; esp. (Steam engine), that part of an indicator diagram which shows the declining pressure of the steam as it expands in the cylinder.

{Expansion gear} (Steam Engine). a cut-off gear. See Illust. of {Link motion}.

{Automatic expansion gear} or {Automatic cut-off}, one that is regulated by the governor, and varies the supply of steam to the engine with the demand for power.

{Fixed expansion gear}, or {Fixed cut-off}, one that always operates at the same fixed point of the stroke.

{Expansion joint}, or {Expansion coupling} (Mech. & Engin.), a yielding joint or coupling for so uniting parts of a machine or structure that expansion, as by heat, is prevented from causing injurious strains; as: (a) A slide or set of rollers, at the end of bridge truss, to support it but allow end play. (b) A telescopic joint in a steam pipe, to permit one part of the pipe to slide within the other. (c) A clamp for holding a locomotive frame to the boiler while allowing lengthwise motion. (d) a strip of compressible material placed at intervals between blocks of poured concrete, as in roads or sidewalks.

{Expansion valve} (Steam Engine), a cut-off valve, to shut off steam from the cylinder before the end of each stroke. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Fixed cut-off — Expansion Ex*pan sion, n. [L. expansio: cf. F. expansion.] 1. The act of expanding or spreading out; the condition of being expanded; dilation; enlargement. [1913 Webster] 2. That which is expanded; expanse; extend surface; as, the expansion of a …   The Collaborative International Dictionary of English

  • Automatic expansion gear — Expansion Ex*pan sion, n. [L. expansio: cf. F. expansion.] 1. The act of expanding or spreading out; the condition of being expanded; dilation; enlargement. [1913 Webster] 2. That which is expanded; expanse; extend surface; as, the expansion of a …   The Collaborative International Dictionary of English

  • cut-out — cut outs 1) N COUNT A cardboard cut out is a shape that has been cut from thick card. You d swear he was a cardboard cut out except that he d moved his rifle... You can have your picture taken with a cutout of David Beckham. 2) N COUNT: oft N n A …   English dictionary

  • cut — v. & n. v. (cutting; past and past part. cut) 1 tr. (also absol.) penetrate or wound with a sharp edged instrument (cut his finger; the knife won t cut). 2 tr. & intr. (often foll. by into) divide or be divided with a knife etc. (cut the bread;… …   Useful english dictionary

  • Automatic Performance Control — (APC) was the first engine knock and boost control system that was introduced on turbo charged Saab H engines in 1982 and was fitted to all subsequent 900 Turbos through 1993 (and 1994 convertibles), as well as 9000 Turbos through 1989. The APC… …   Wikipedia

  • cut — v 1. gash, slash, lance, slit, slice; notch, ridge, Cookery. score; sever, abscind, split, carve, cleave, sunder; rend, rive, tear, rip; divide, section, apportion; dissect, cut apart, anatomize, disjoint, quarter; disjoin, disunite, dismember. 2 …   A Note on the Style of the synonym finder

  • M1918 Browning Automatic Rifle — Not to be confused with Browning BAR. Rifle, Caliber .30, Automatic, Browning, M1918 The M1918A2 BAR Type …   Wikipedia

  • Sign-off — (or closedown) is the sequence of operations involved when a radio or television station shuts down its transmitters and goes off the air for a predetermined period; generally this occurs during the overnight hours. It is the opposite to a sign… …   Wikipedia

  • Bird automatic — Infobox musical artist Name = Bird Automatic Img capt = Background = group or band Origin = Flagicon|AUS Sydney, New South Wales, Australia Genre = Indie pop Label = Independent Years active = 2006 present URL =… …   Wikipedia

  • Smack-Off — The Smack Off is an annual invitation only competition on The Jim Rome Show , held in mid to late spring and which takes up the entire program on a Friday. The contest is a way to recognize the best callers to the show, as well as a means of… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”