| grid | An electric utility's system for distributing power. (05 Dec 1998) |
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| grid connection | Joining a plant that generates electric power to a utility system so that electricity can flow in either direction between the utility system and the plant. (05 Dec 1998) |
| grid ratio | In a radiographic scatter-absorbing grid, the ratio of the height to the width of the gaps between lead strips; a higher grid ratio removes more scattered radiation but requires more careful X-ray tube positioning to avoid grid cutoff of the primary radiation beam. (05 Mar 2000) |
| gridiron | 1. A grated iron utensil for broiling flesh and fish over coals. 2. An openwork frame on which vessels are placed for examination, cleaning, and repairs. Gridiron pendulum. See Pendulum. <engineering> Gridiron valve, a slide valve with several parallel perforations corresponding to openings in the seat on which the valve moves. Origin: OE. Gredire, gredirne, from tthe same source as E. Griddle, but the ending wass confused with E. Iron. See Griddle. Source: Websters Dictionary (01 Mar 1998) |
| Gridley's stain | <technique> For fungi, a method for fixed tissue sections based on Bauer's chromic acid leucofuchsin stain with the addition of Gomori's aldehyde fuchsin stain and metanil yellow as counterstains; against a yellow background, hyphae, conidia, yeast capsules, elastin, and mucin appear in different shades of blue to purple. (05 Mar 2000) |
| Gridley, Mary | <person> U.S. Medical technologist, 1908-1954. See: Gridley's stain, Gridley's stain for fungi. (05 Mar 2000) |
| Wetzel grid | Chart of growth, plotting height, weight, physical fitness and related aspects of young and adolescent children during growth. (05 Mar 2000) |
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| focused grid | A grid in which the divergent beam of X-rays from a particular distance range will be parallel to the lead strips. (05 Mar 2000) |