mean water level — the mean surface level as determined by averaging the heights of water at equal intervals of time, usually hourly … Dictionary of ichthyology
mean sea level — the mean surface water level determined by averaging heights at all stages of the tide over a certain period, usually a 19 year period. Usually determined from a fixed predetermined reference level or chart datum … Dictionary of ichthyology
Water level — Level Lev el (l[e^]v [e^]l), n. [OE. level, livel, OF. livel, F. niveau, fr. L. libella level, water level, a plumb level, dim. of libra pound, measure for liquids, balance, water poise, level. Cf. {Librate}, {Libella}.] 1. A line or surface to… … The Collaborative International Dictionary of English
mean tide level — half tide level (plane midway between mean high water and mean low water) … Dictionary of ichthyology
mean sea level — noun the sea level halfway between the mean levels of high and low water … English new terms dictionary
Level — Lev el (l[e^]v [e^]l), n. [OE. level, livel, OF. livel, F. niveau, fr. L. libella level, water level, a plumb level, dim. of libra pound, measure for liquids, balance, water poise, level. Cf. {Librate}, {Libella}.] 1. A line or surface to which,… … The Collaborative International Dictionary of English
Level of the sea — Level Lev el (l[e^]v [e^]l), n. [OE. level, livel, OF. livel, F. niveau, fr. L. libella level, water level, a plumb level, dim. of libra pound, measure for liquids, balance, water poise, level. Cf. {Librate}, {Libella}.] 1. A line or surface to… … The Collaborative International Dictionary of English
mean — 1. v.tr. (past and past part. meant) 1 a (often foll. by to + infin.) have as one s purpose or intention; have in mind (they really mean mischief; I didn t mean to break it). b (foll. by by) have as a motive in explanation (what do you mean by… … Useful english dictionary
Water clock — For the individual water clock at The Children s Museum of Indianapolis, see Water clock (Indianapolis). A display of two outflow water clocks from the Ancient Agora Museum in Athens. The top is an original from the late 5th century BC. The… … Wikipedia
Water-meadow — A water meadow (also water meadow or watermeadow) is an area of grassland subject to controlled irrigation to increase agricultural productivity. Water meadows were mainly used in Europe from the 16th to the early 20th centuries. Working water… … Wikipedia
