gravel ballast

См. также в других словарях:

• Ballast — Bal last (b[a^]l last), n. [D. ballast; akin to Dan. baglast, ballast, OSw. barlast, Sw. ballast. The first part is perh. the same word as E. bare, adj.; the second is last a burden, and hence the meaning a bare, or mere, load. See {Bare}, a.,… …   The Collaborative International Dictionary of English

• Ballast engine — Ballast Bal last (b[a^]l last), n. [D. ballast; akin to Dan. baglast, ballast, OSw. barlast, Sw. ballast. The first part is perh. the same word as E. bare, adj.; the second is last a burden, and hence the meaning a bare, or mere, load. See {Bare} …   The Collaborative International Dictionary of English

• ballast — [bal′əst] n. [LowG < MDu < bal, bad, useless (akin to OE bealu,BALE2) + last, a load] 1. anything heavy carried in a ship, aircraft, or vehicle to give stability or in a balloon or airship to help control altitude 2. anything giving… …   English World dictionary

• Ballast — Bal last, v. t. [imp. & p. p. {Ballasted}; p. pr. & vb. n. {Ballasting}.] 1. To steady, as a vessel, by putting heavy substances in the hold. [1913 Webster] 2. To fill in, as the bed of a railroad, with gravel, stone, etc., in order to make it… …   The Collaborative International Dictionary of English

• ballast — ► NOUN 1) a heavy substance carried by a ship or hot air balloon to keep it stable. 2) gravel or coarse stone used to form the base of a railway track or road. 3) a passive component used in an electric circuit to moderate changes in current.… …   English terms dictionary

• ballast — ballaster, n. ballastic /beuh las tik/, adj. /bal euhst/, n. 1. Naut. any heavy material carried temporarily or permanently in a vessel to provide desired draft and stability. 2. Aeron. something heavy, as bags of sand, placed in the car of a… …   Universalium

• Ballast regulator — A ballast regulator is a piece of rail transport maintenance of way equipment used to shape and distribute the gravel track ballast that supports the ties in rail tracks. [cite web url=http://www.robl.w1.com/pix rrc/I 031019.htm title=Ernest H.… …   Wikipedia

• ballast — [ baləst] noun 1》 a heavy substance, such as gravel or lead, placed in the bilge of a ship to ensure its stability.     ↘a substance carried in an airship or on a hot air balloon to stabilize it. 2》 gravel or coarse stone used to form the bed of… …   English new terms dictionary

• ballast — I. noun Etymology: probably from Low German, of Scandinavian origin; akin to Danish & Swedish barlast ballast; perhaps akin to Old English bær bare & to Old English hlæst load, hladan to load more at lade Date: 1530 1. a heavy substance placed in …   New Collegiate Dictionary

• Ballast cleaner — A ballast cleaner is a railway machine that specialises in cleaning the railway track ballast (gravel, blue stone or other aggregate) of impurities. External links [http://www.grandadsez.co.uk/railways/ballast cleaners.html] Technical Information …   Wikipedia

• ballast — /ˈbæləst / (say baluhst) noun 1. any heavy material carried by a ship or boat for ensuring proper stability, so as to avoid capsizing and to secure the greatest effectiveness of the propelling power. 2. something heavy, as bags of sand, placed in …