Median line. (a) (Anat.) Any line in the mesial plane; specif., either of the lines in which the mesial plane meets the surface of the body. (b) (Geom.) The line drawn from an angle of a triangle to the middle of the opposite side; any line having the nature of a diameter.Median plane(Anat.), the mesial plane.Median point(Geom.), the point where the three median lines of a triangle mutually intersect.

(Me"di*an), n. (Geom.) A median line or point.

(Me"di*ant) n. [L. medians, p. p. of mediare to halve: cf. It. mediante, F. médiante.] (Mus.) The third above the keynote; — so called because it divides the interval between the tonic and dominant into two thirds.

(Me`di*as*ti"nal) a. (Anat.) Of or pertaining to a mediastinum.

(Me`di*as"tine ||Me`di*as*ti"num) n. [NL. mediastinum, fr. L. medius middle; cf. mediastinus helper, a menial servant, LL. mediastinus equiv. to medius: cf F. médiastin.] (Anat.) A partition; a septum; specifically, the folds of the pleura (and the space included between them) which divide the thorax into a right and left cavity. The space included between these folds of the pleura, called the mediastinal space, contains the heart and gives passage to the esophagus and great blood vessels.

(Me"di*ate) a. [L. mediatus, p. p. of mediare, v. t., to halve, v. i., to be in the middle. See Mid, and cf. Moiety.]

1. Being between the two extremes; middle; interposed; intervening; intermediate. Prior.

2. Acting by means, or by an intervening cause or instrument; not direct or immediate; acting or suffering through an intervening agent or condition.

3. Gained or effected by a medium or condition. Bacon.

An act of mediate knowledge is complex.
Sir W. Hamilton.

(Me"di*ate) v. i. [imp. & p. p. Mediated ; p. pr. & vb. n. Mediating.] [LL. mediatus, p. p. of mediare to mediate. See Mediate, a.]

1. To be in the middle, or between two; to intervene. [R.]

(Me`di*æ"val*ist), n. One who has a taste for, or is versed in, the history of the Middle Ages; one in sympathy with the spirit or forms of the Middle Ages. [Written also medievalist.]

(Me`di*æ"val*ly), adv. In the manner of the Middle Ages; in accordance with mediævalism.

(Me`di*æ"vals) n. pl. The people who lived in the Middle Ages. Ruskin.

(Me"di*al) a. [L. medialis, fr. medius middle: cf. F. médial. See Middle.] Of or pertaining to a mean or average; mean; as, medial alligation.

(Me"di*al), n. (Phonetics) See 2d Media.

(||Me"di*a*lu"na) n. [Sp. media luna half-moon.] (Zoöl.) See Half- moon.

(Me"di*an) a. [L. medianus, fr. medius middle. See Medial.]

1. Being in the middle; running through the middle; as, a median groove.

2. (Zoöl.) Situated in the middle; lying in a plane dividing a bilateral animal into right and left halves; — said of unpaired organs and parts; as, median coverts.

  By PanEris using Melati.

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