| rough trees | Live trees of commercial species which do not contain a sawlog because of roughness, poor form, splits, or cracks. Includes all living trees of noncommercial species. (05 Dec 1998) |
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| decision trees | A graphic device used in decision analysis, series of decision options are represented as branches (hierarchical). (12 Dec 1998) |
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| trees | Woody, usually tall, perennial higher plants (angiosperms, gymnosperms, and some pterophyta) having usually a main stem and numerous branches. (12 Dec 1998) |
| rough | Not smooth; denoting the irregular, coarsely granular surface of a certain bacterial colony type. (05 Mar 2000) |
| rough colony | A bacterial colony with a granular, flattened surface; this type of colony is usually associated with loss of virulence with respect to that of smooth colony's. (05 Mar 2000) |
| rough endoplasmic reticulum | <cell biology> Membrane organelle of eukaryotes that forms sheets and tubules. Contains the receptor for the signal receptor particle and binds ribosomes engaged in translating mRNA for secreted proteins and the majority of transmembrane proteins. Also a site of membrane lipid synthesis. The membrane is very similar to the nuclear outer membrane. The lumen contains a number of proteins that possess the C terminal signal KDEL. (17 Dec 1997) |
| rough-footed | <zoology> Feather-footed; as, a rough-footed dove. Source: Websters Dictionary (01 Mar 1998) |
| rough-legged | <zoology> Having the legs covered with feathers; said of a bird. Rough-legged hawk. <zoology> See Roughleg. Source: Websters Dictionary (01 Mar 1998) |
| rough line | A rough ridge with two pronounced lips running down the posterior surface of the shaft of the femur; the lateral lip of the linea aspera is a continuation of the gluteal tuberosity, the medial lip of the intertrochanteric line; it affords attachment to the vastus medialis, adductor longus, adductor magnus, adductor brevis, the short head of the biceps, and the vastus lateralis muscles as well as to the intermuscular septa of the thigh. Synonym: rough line. (05 Mar 2000) |
| rough microsome | <cell biology> Small vesicles obtained by sonicating cells and that are derived from the rough endoplasmic reticulum. Have bound ribosomes and can be used to study protein syntheis. Origin: Gr. Soma = body (17 Dec 1997) |
| rough strain | <microbiology> Bacterial strains that have altered outer cell wall carbohydrate chains causing colonies on agar to change their appearance from smooth to dull. In Streptococci the smooth strains are virulent whereas the rough strains are not. This is partly because the rough strains are much more readily phagocytosed. (17 Dec 1997) |
| rough-surfaced endoplasmic reticulum | Endoplasmic reticulum in which ribosomal granules are applied to the cytoplasmic surface of the cisternae; involved in the synthesis and secretion of protein via membrane-bound vesicles to the extracellular space. Synonym: chromidial substance, ergastoplasm, rough-surfaced endoplasmic reticulum. (05 Mar 2000) |
| endoplasmic reticulum, rough | A type of endoplasmic reticulum (er) where polyribosomes are present on the cytoplasmic surfaces of the er membranes. This form of er is prominent in cells specialised for protein secretion and its principal function is to segregate proteins destined for export or intracellular utilization. (12 Dec 1998) |