| beaker | A thin glass vessel, with a lip (beak) for pouring, used as containers for liquids. (05 Mar 2000) |
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| beaker cell | 1. <pathology> Cell of the epithelial lining of small intestine that secretes mucus and has a very well developed Golgi apparatus. 2. <zoology> Cell type characteristic of larval lepidopteran midgut, containing a potent H ATPase and thought to be involved in maintenance of ion and pH gradients. (10 Oct 1997) |
| beakhead | 1. An ornament used in rich Norman doorways, resembling a head with a beak. 2. Same as Beak. Source: Websters Dictionary (01 Mar 1998) |
| beal | <medicine> A small inflammatory tumour; a pustule. [Prov. Eng. See: Boil a tumour. Source: Websters Dictionary (01 Mar 1998) |
| Beale | Lionel S., British physician, 1828-1906. See: Beale's cell. (05 Mar 2000) |
| Beale's cell | A bipolar ganglion cell of the heart with one spiral and one straight prolongation. (05 Mar 2000) |
| beam | <radiobiology> Stream of particles or electromagnetic radiation travelling in a single direction. (09 Oct 1997) |
| beam dump | <radiobiology> A mass of shielding material which absorbs the energy of a beam of particles or electromagnetic radiation. (09 Oct 1997) |
| beam splitter | <radiobiology> Optical device for dividing a beam of electromagnetic radiation into two or more separate beams. (09 Oct 1997) |
| beam tree | <botany> A tree (Pyrus aria) related to the apple. Origin: AS. Beam a tree. See: Beam. Source: Websters Dictionary (01 Mar 1998) |
| beam-beam reaction | <radiobiology> Fusion reaction which occurs from the collision of two fast ions originating in injected neutral beams. (09 Oct 1997) |
| beam-plasma reaction | <radiobiology> Fusion reaction which occurs from the collision of a fast beam ion with a thermal plasma ion. (09 Oct 1997) |
| beam-wall reaction | <radiobiology> Fusion reaction which occurs from the collision of a fast beam ion with an ion embedded in or adsorbed onto the reactor wall. (09 Oct 1997) |
| beambird | <zoology> A small European flycatcher (Muscicapa gricola), so called because it often nests on a beam in a building. Source: Websters Dictionary (01 Mar 1998) |
| bean | 1. <botany> A name given to the seed of certain leguminous herbs, chiefly of the genera Faba, Phaseolus, and Dolichos; also, to the herbs. The origin and classification of many kinds are still doubtful. Among true beans are: the black-eyed bean and China bean, included in Dolichos Sinensis; black Egyptian bean or hyacinth bean, D. Lablab; the common haricot beans, kidney beans, string beans, and pole beans, all included in Phaseolus vulgaris; the lower bush bean, Ph. Vulgaris, variety nanus; Lima bean, Ph. Lunatus; Spanish bean and scarlet runner, Ph. Maltiflorus; Windsor bean, the common bean of England, Faba vulgaris. As an article of food beans are classed with vegetables. 2. The popular name of other vegetable seeds or fruits, more or less resembling true beans. <zoology> Bean aphis, a small weevil that in the larval state destroys beans. The American species in Bruchus fabae. <botany> Florida bean, a species of Strychnos. Navy bean, the common dried white bean of commerce; probably so called because an important article of food in the navy. Pea bean, a very small and highly esteemed variety of the edible white bean; so called from its size. Sacred bean. See Sacred. Screw bean. See Screw. Sea bean. Same as Florida bean. A red bean of unknown species used for ornament. Tonquin bean, or Tonka bean, the fragrant seed of Dipteryx odorata, a leguminous tree. Vanilla bean. See Vanilla. Origin: OE. Bene, AS.bean; akin to D. Boon, G. Bohne, OHG. Pna, Icel. Baun, Dan. Bonne, Sw. Bona, and perh. To Russ. Bob, L. Faba. Source: Websters Dictionary (01 Mar 1998) |