| watermark | <botany> A line on vegetation or other upright structures that represents the maximum height reached in an inundation (flooding) event. (09 Oct 1997) |
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| watermaster | An official of the Oregon Water Resources Department who allocates available surface or groundwater in the state. (05 Dec 1998) |
| watermelon | <botany> The very large ovoid or roundish fruit of a cucurbitaceous plant (Citrullus vulgaris) of many varieties; also, the plant itself. The fruit sometimes weighs many pounds; its pulp is usually pink in colour, and full of a sweet watery juice. It is a native of tropical Africa, but is now cultivated in many countries. Source: Websters Dictionary (01 Mar 1998) |
| waterpot | A vessel for holding or conveying water, or for sprinkling water on cloth, plants, etc. Source: Websters Dictionary (01 Mar 1998) |
| waterpox | varicella Previous: water pollutants, radioactive, water pore, waterpot, water potentialNext: water pox, water purification, water purslane, water qualmwater pox <medicine> A variety of chicken pox, or varicella. Source: Websters Dictionary (01 Mar 1998) |
| waters | Colloquialism for amniotic fluid. Bag of waters, bag. False waters, a leakage of fluid prior to or in beginning labour, before the rupture of the amnion. (05 Mar 2000) |
| Waters' operation | An extraperitoneal cesarean section with a supravesical approach. (05 Mar 2000) |
| Waters' projection | A PA radiographic view of the skull made with the orbitomeatal line at an angle of 37 |
| Waters' view | A PA radiographic view of the skull made with the orbitomeatal line at an angle of 37 |
| Waters' view radiograph | A radiographic frontal view of the maxillary sinuses, orbits, nasal structures and zygomas; permits direct comparison of the sides. Synonym: Waters' view radiograph. (05 Mar 2000) |
| Waters, Charles Alexander | <person> U.S. Radiologist, 1888-1961. See: Waters' view radiograph. (05 Mar 2000) |
| Waters, Edward | <person> U.S. Obstetrician and gynecologist, *1898. See: Waters' operation. (05 Mar 2000) |
| watershed | 1. The whole region or extent of country which contributes to the supply of a river or lake. 2. The line of division between two adjacent rivers or lakes with respect to the flow of water by natural channels into them; the natural boundary of a basin. Origin: Cf. G. Wasserscheide; wasser water + scheide a place where two things separate, fr. Scheiden to separate. Source: Websters Dictionary (01 Mar 1998) |
| watershed infarction | Cortical infarction in an area where the distribution of major cerebral arteries meet or overlap. (05 Mar 2000) |
| watershoot | 1. A sprig or shoot from the root or stock of a tree. 2. That which serves to guard from falling water; a drip or dripstone. 3. A trough for discharging water. Source: Websters Dictionary (01 Mar 1998) |