| racoonda | <zoology> The coypu. Origin: From a native name. Source: Websters Dictionary (01 Mar 1998) |
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| racquet hypha | A vegetative hypha with distal ends of successive cells inflated, resembling a string of elongated snowshoes or tennis racquets; seen in many mycelial fungi, e.g., many dermatophyte species in culture. (05 Mar 2000) |
| racquet sports | Games in which players use a racquet to hit a ball or similar type object. (12 Dec 1998) |
| racy | 1. Having a strong flavor indicating origin; of distinct characteristic taste; tasting of the soil; hence, fresh; rich. "The racy wine, Late from the mellowing cask restored to light." (Pope) 2. Hence: Exciting to the mental taste by a strong or distinctive character of thought or language; peculiar and piquant; fresh and lively. "Our raciest, most idiomatic popular word." (M. Arnold) "Burn's English, though not so racy as his Scotch, is generally correct." (H. Coleridge) "The rich and racy humor of a natural converser fresh from the plow." (Prof. Wilson) Synonym: Spicy, spirited, lively, smart, piquant. Racy, Spicy. Racy refers primarily to that peculiar flavor which certain wines are supposed to derive from the soil in which the grapes were grown; and hence we call a style or production racy when it "smacks of the soil," or has an uncommon degree of natural freshness and distinctiveness of thought and language. Spicy, when applied, has reference to a spirit and pungency added by art, seasoning the matter like a condiment. It does not, like racy, suggest native peculiarity. A spicy article in a magazine; a spicy retort. Racy in conversation; a racy remark. "Rich, racy verses, in which we The soil from which they come, taste, smell, and see." (Cowley) Origin: From Race a tribe, family. Source: Websters Dictionary (01 Mar 1998) |
| rad | <radiobiology> A unit of absorbed dose: One rad is 0.01 Joule absorbed per kilogram of any material. (Also defined as 100 ergs per gram and written rad). It is being replaced by the gray (Gy). One rad equals one hundredth of a gray. (16 Dec 1997) |
| Rad3 ATPase-DNA helicase | <enzyme> Can unwind duplex regions as short as 11 base pairs in a partially duplex circular DNA substrate; on partially duplex linear substrates, the enzyme has a strict 5'--3' polarity with respect to the single strand to which it binds; nicked circular DNA is not utilised; from saccharomyces cerevisiae Registry number: EC 3.6.1.- Synonym: rad3 protein (26 Jun 1999) |
| radar | A system using beamed and reflected radio signals to and from an object in such a way that range, bearing, and other characteristics of the object may be determined. (12 Dec 1998) |
| radarkymography | An obsolete procedure involving the video tracking of heart motion by means of image intensification and closed circuit television during fluoroscopy; enabled cardiac motion to be measured by reproducible linear graphic tracing. (05 Mar 2000) |
| raddle | 1. A long, flexible stick, rod, or branch, which is interwoven with others, between upright posts or stakes, in making a kind of hedge or fence. 2. A hedge or fence made with raddles; called also raddle hedge. 3. An instrument consisting of a woodmen bar, with a row of upright pegs set in it, used by domestic weavers to keep the warp of a proper width, and prevent tangling when it is wound upon the beam of the loom. Origin: Cf. G. Rader, radel, sieve, or perhaps E. Reed. Source: Websters Dictionary (01 Mar 1998) |
| raddock | <zoology> The ruddock. Source: Websters Dictionary (01 Mar 1998) |
| radectomy | Synonym: root amputation. Origin: L. Radix, root, + G. Ektome, excision (05 Mar 2000) |
| Radford | Edward P., Jr., U.S. Physiologist, *1922. See: Radford nomogram. (05 Mar 2000) |
| Radford nomogram | A nomogram used to predict necessary tidal volume for artificial respiration on the basis of respiratory rate, body weight, and sex; correction factors are supplied for activity, fever, altitude, metabolic acidosis, and alterations in dead space. (05 Mar 2000) |
| radi-ate-veined | <botany> Having the principal veins radiating, or diverging, from the apex of the petiole; said of such leaves as those of the grapevine, most maples, and the castor-oil plant. Source: Websters Dictionary (01 Mar 1998) |
| radiability | The property of being radiable. (05 Mar 2000) |