gravel ballast
1Ballast — 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.,… …
2Ballast 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} …
3ballast — [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… …
4Ballast — 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… …
5ballast — ► 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.… …
6ballast — 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… …
7Ballast 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.… …
8ballast — [ 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… …
9ballast — 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 …
10Ballast 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 …
