| stationary | 1. Not moving; not appearing to move; stable; fixed. "Charles Wesley, who is a more stationary man, does not believe the story." (Southey) 2. Not improving or getting worse; not growing wiser, greater, better, more excellent, or the contrary. 3. Appearing to be at rest, because moving in the line of vision; not progressive or retrograde, as a planet. <physiology> Stationary air, the air which under ordinary circumstances does not leave the lungs in respiration. Stationary engine. A steam engine thet is permanently placed, in distinction from a portable engine, locomotive, marine engine, etc. Specifically: A factory engine, in distinction from a blowing, pumping, or other kind of engine which is also permanently placed. Origin: L. Stationarius: cf. F. Stationnaire. Cf. Stationer. Source: Websters Dictionary (01 Mar 1998) |
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| stationary anchorage | Anchorage in which the resistance to the movement of one or more teeth comes from the resistance to bodily movement of the anchorage unit; a questionable concept since the selected teeth remain only relatively stable. (05 Mar 2000) |
| stationary cataract | A cataract that does not progress. (05 Mar 2000) |
| stationary phase | The plateau of the growth curve after log growth in a culture, duringwhich cellnumber remains constant. New cells are produced at the same rate as oldercells die. (09 Oct 1997) |
| grid | An electric utility's system for distributing power. (05 Dec 1998) |
| 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) |
| Wetzel grid | Chart of growth, plotting height, weight, physical fitness and related aspects of young and adolescent children during growth. (05 Mar 2000) |
| 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) |