Beam center
Beam Beam (b[=e]m), n. [AS. be['a]m beam, post, tree, ray of light; akin to OFries. b[=a]m tree, OS. b[=o]m, D. boom, OHG. boum, poum, G. baum, Icel. ba[eth]mr, Goth. bagms and Gr. fy^ma a growth, fy^nai to become, to be. Cf. L. radius staff, rod, spoke of a wheel, beam or ray, and G. strahl arrow, spoke of a wheel, ray or beam, flash of lightning. [root]97. See {Be}; cf. {Boom} a spar.] 1. Any large piece of timber or iron long in proportion to its thickness, and prepared for use. [1913 Webster]

2. One of the principal horizontal timbers of a building or ship. [1913 Webster]

The beams of a vessel are strong pieces of timber stretching across from side to side to support the decks. --Totten. [1913 Webster]

3. The width of a vessel; as, one vessel is said to have more beam than another. [1913 Webster]

4. The bar of a balance, from the ends of which the scales are suspended. [1913 Webster]

The doubtful beam long nods from side to side. --Pope. [1913 Webster]

5. The principal stem or horn of a stag or other deer, which bears the antlers, or branches. [1913 Webster]

6. The pole of a carriage. [Poetic] --Dryden. [1913 Webster]

7. A cylinder of wood, making part of a loom, on which weavers wind the warp before weaving; also, the cylinder on which the cloth is rolled, as it is woven; one being called the fore beam, the other the back beam. [1913 Webster]

8. The straight part or shank of an anchor. [1913 Webster]

9. The main part of a plow, to which the handles and colter are secured, and to the end of which are attached the oxen or horses that draw it. [1913 Webster]

10. (Steam Engine) A heavy iron lever having an oscillating motion on a central axis, one end of which is connected with the piston rod from which it receives motion, and the other with the crank of the wheel shaft; -- called also {working beam} or {walking beam}. [1913 Webster]

11. A ray or collection of parallel rays emitted from the sun or other luminous body; as, a beam of light, or of heat. [1913 Webster]

How far that little candle throws his beams! --Shak. [1913 Webster]

12. (Fig.): A ray; a gleam; as, a beam of comfort. [1913 Webster]

Mercy with her genial beam. --Keble. [1913 Webster]

13. One of the long feathers in the wing of a hawk; -- called also {beam feather}. [1913 Webster]

{Abaft the beam} (Naut.), in an arc of the horizon between a line that crosses the ship at right angles, or in the direction of her beams, and that point of the compass toward which her stern is directed.

{Beam center} (Mach.), the fulcrum or pin on which the working beam of an engine vibrates.

{Beam compass}, an instrument consisting of a rod or beam, having sliding sockets that carry steel or pencil points; -- used for drawing or describing large circles.

{Beam engine}, a steam engine having a working beam to transmit power, in distinction from one which has its piston rod attached directly to the crank of the wheel shaft.

{Before the beam} (Naut.), in an arc of the horizon included between a line that crosses the ship at right angles and that point of the compass toward which the ship steers.

{On the beam}, in a line with the beams, or at right angles with the keel.

{On the weather beam}, on the side of a ship which faces the wind.

{To be on her beam ends}, to incline, as a vessel, so much on one side that her beams approach a vertical position. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Beam — (b[=e]m), n. [AS. be[ a]m beam, post, tree, ray of light; akin to OFries. b[=a]m tree, OS. b[=o]m, D. boom, OHG. boum, poum, G. baum, Icel. ba[eth]mr, Goth. bagms and Gr. fy^ma a growth, fy^nai to become, to be. Cf. L. radius staff, rod, spoke of …   The Collaborative International Dictionary of English

  • Beam compass — Beam Beam (b[=e]m), n. [AS. be[ a]m beam, post, tree, ray of light; akin to OFries. b[=a]m tree, OS. b[=o]m, D. boom, OHG. boum, poum, G. baum, Icel. ba[eth]mr, Goth. bagms and Gr. fy^ma a growth, fy^nai to become, to be. Cf. L. radius staff, rod …   The Collaborative International Dictionary of English

  • Beam engine — Beam Beam (b[=e]m), n. [AS. be[ a]m beam, post, tree, ray of light; akin to OFries. b[=a]m tree, OS. b[=o]m, D. boom, OHG. boum, poum, G. baum, Icel. ba[eth]mr, Goth. bagms and Gr. fy^ma a growth, fy^nai to become, to be. Cf. L. radius staff, rod …   The Collaborative International Dictionary of English

  • beam feather — Beam Beam (b[=e]m), n. [AS. be[ a]m beam, post, tree, ray of light; akin to OFries. b[=a]m tree, OS. b[=o]m, D. boom, OHG. boum, poum, G. baum, Icel. ba[eth]mr, Goth. bagms and Gr. fy^ma a growth, fy^nai to become, to be. Cf. L. radius staff, rod …   The Collaborative International Dictionary of English

  • Beam-powered propulsion — is a class of spacecraft propulsion mechanisms that use energy beamed to the spacecraft from a remote power plant. Most designs are rocket engines where the energy is provided by the beam, and is used to superheat propellant that then provides… …   Wikipedia

  • Center of percussion — The center of percussion is the point on an object where a perpendicular impact will produce translational and rotational forces which perfectly cancel each other out at some given pivot point, so that the pivot will not be moving momentarily… …   Wikipedia

  • Beam diameter — The beam diameter or beam width of an electromagnetic beam is the diameter along any specified line that is perpendicular to the beam axis and intersects it. Since beams typically do not have sharp edges, the diameter can be obtained in many… …   Wikipedia

  • BEAM robotics — The word beam in BEAM robotics is an acronym for Biology, Electronics, Aesthetics, and Mechanics . This is a term that refers to a style of robotics that primarily uses simple analog circuits, such as comparators, instead of a microprocessor in… …   Wikipedia

  • Beam compass — A beam compass is a compass with a beam and sliding sockets or cursors for drawing and dividing circles larger than those made by a regular pair of compasses.[1] The instrument can be as a whole, or made on the spot with individual sockets… …   Wikipedia

  • beam — ray, beam are comparable when they denote a shaft of light. This conception of light as a shaft is fixed in our language but is not always in keeping with modern scientific views of the nature of light. Ray suggests emanation from a center or… …   New Dictionary of Synonyms

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