meridian

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meridian

One of the imaginary lines running north and south and used by surveyors for reference in locating and describing land. Each area has a principal meridian as the reference for all other lines.Because of the curvature of the earth,though,meridian lines cannot remain an equal distance apart, because they converge as they approach the North Pole.As a result,correcting lines, called guide lines,are run at 24-mile intervals.The correcting lines break and then re-form at each base line.See also public land survey system.
References in periodicals archive ?
meridianus with altitude is a compensatory adaptation.
Keywords: Midday gerbil, Meriones meridianus, auditory bulla, altitude, environmental factors.
was found in low abundance whereas Mesocyclops meridianus (Kiefer 1926) was frequent.
meridianus (Copepoda) was frequent in the floating macrophytes area.
meridianus (Steel, 1961), Jaera italica and J nordmanni (Veuille, 1980).
Taxon C0 C1 C2 C3 COPEPODA Cyclopidae Eucyclops elegans (Herrick, 1884) X Mesocyclops meridianus (Kiefer, 1926) X X X X Metacyclops mendocinus (Wierzejski, 1892) X X X X Paracyclops chiltoni (Thomson, 1883) X Thermocyclops decipiens (Kiefer, 1929) X X X X Thermocyclops inversus (Kiefer, 1936) X X Tropocyclops prasinus (Fischer, 1860) X X Diaptomidade Notodiaptomus cearensis (Wright, 1936) X X X X Harpacticoida Potamocaris sp.
CALANOIDA Argyrodiaptomus furcatus (Sars, 1901) Notodiaptomus conifer (Sars, 1901) Notodiaptomus iheringi Wright, 1935 CYCLOPOIDA Eucyclops serrulatus (Fischer, 1851) Mesocyclops longisetus (Thiebaud, 1914) Mesocyclops meridianus Kiefer, 1926 Mesocyclops kieferi van de Velde, 1984 Paracyclops fimbriatus (Fischer, 1853) Thermocyclops decipiens (Kiefer, 1929) Thermocyclops minutus (Lowndes, 1934) POECILOSTOMATOIDA Ergasilus sp.