| gr. | grain; 1 gr. = 0.0648 gm |
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| gr | grade; graft; grain; gram; gravity; gray; gross |
| AGD | Argyrophilic grain disease |
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| aleurone grain | <plant biology> Membrane bounded storage granule within plant cells that usually contains protein. May be an aleuroplast or just a specialised vacuole. (18 Nov 1997) |
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| grain | <botany> A fruit characteristic of grasses (such as rice), pollen grain, a microspore of a seed plant, or the partially developed gametophyte formed from it. (09 Oct 1997) |
| grain alcohol | <chemical> An organic chemical containing one or more hydroxyl groups. Alcohols can be liquids, semisolids or solids at room temperature. Common alcohols include ethanol (the type found in alcoholic beverages) methanol (found in methylated spirit and can cause blindness and other nervous system damage if ingested) and propanol. (06 May 1997) |
| grain itch | A cutaneous eruption occasionally noted in farmers and grain handlers, caused by the action of the mite Pyemotes ventricosus. (05 Mar 2000) |
| bark beetle | <zoology> A small beetle of many species (family Scolytidae), which in the larval state bores under or in the bark of trees, often doing great damage. Source: Websters Dictionary (01 Mar 1998) |
| beetle | Any insect of the order Coleoptera, having four wings, the outer pair being stiff cases for covering the others when they are folded up. See Coleoptera. <zoology> Beetle mite, one of many species of mites, of the family Oribatidae, parasitic on beetles. Black beetle, the common large black cockroach (Blatta orientalis). Origin: OE. Bityl, bittle, AS. Btel, fr. Btan to bite. See Bite. Source: Websters Dictionary (01 Mar 1998) |
| blister beetle poisoning | Poisoning, most often of horses, by ingestion of blister beetles (Epicauta spp.) in hay; the causative toxin is cantharidin, which produces salivation, shock, pollakiuria, and colic. (05 Mar 2000) |
| goliath beetle | <zoology> Any species of Goliathus, a genus of very large and handsome African beetles. Origin: From Goliath, the Philistine giant. Source: Websters Dictionary (01 Mar 1998) |
| water beetle | <zoology> Any one of numerous species of aquatic beetles belonging to Dytiscus and allied genera of the family Dytiscidae, and to various genera of the family Hydrophilidae. These beetles swim with great agility, the fringed hind legs acting together like oars. Source: Websters Dictionary (01 Mar 1998) |
| fire beetle | <zoology> A very brilliantly luminous beetle (Pyrophorus noctilucus), one of the elaters, found in Central and South America; called also cucujo. The name is also applied to other species. See Firefly. Source: Websters Dictionary (01 Mar 1998) |
| flea-beetle | <zoology> A small beetle of the family Halticidae, of many species. They have strong posterior legs and leap like fleas. The turnip flea-beetle (Phyllotreta vittata) and that of the grapevine (Graptodera chalybea) are common injurious species. Source: Websters Dictionary (01 Mar 1998) |
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