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ptum; 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.

To divide into two equal parts. [R.] Holder.

actaceous plants (Melocactus) having a fleshy and usually globose stem with the surface divided into spiny longitudinal ridges, and bearing at the top a prickly and woolly crown in which the small pink flowers are half concealed. M. communis, from the West Indies, is often cultivated, and sometimes called Turk's cap. (…

To divide, limit, or bound. [Obs.] Which meared her rule with Africa. Spenser.

sections by the formation of internal partitions; as, merismatic growth, where one cell divides into many.

One of the vertical muscular radiating partitions which divide the body cavity of Anthozoa into chambers.

One of the three classes into which the fungi are divided in Brefeld's classification. -- Mes`o*my*ce"tous (#), a.

re, the liter, the stere, the gram, etc. These units, and others derived from them, are divided decimally, and larger units are formed from multiples by 10, 100, 1,000, and 10,000. The successive multiplies are designated by the prefixes, deca-, hecto-, kilo-, and myria-; successive parts by deci-, centi-, and milli-.…

coincidence. When the two images are formed by a bisected objects glass, it is called a divided-object-glass micrometer, and when the instrument is large and equatorially mounted, it is known as a heliometer. -- Double refraction micrometer, a species of double image micrometer, in which the two images are formed by t…

The quotient of a unit divided by one million; one of a million equal parts.

nute; continuing; unceasing. [Obs.] Throwing themselves absolutely upon God's minutely providence. Hammond.

is also a mixture of good and evil wisely distributed by God, to serve the ends of his providence. Atterbury.

That by which a thing is to be measured; standard. He that despairs measures Providence by his own little, contracted model. South.

the composition are regulated. Generally, for columns, the semi-diameter is taken, and divided into a certain number of parts, called minutes (see Minute), though often the diameter is taken, and any dimension is said to be so many modules and minutes in height, breadth, or projection.

y resting on the spindle; a millrind. Cross moline (Her.), a cross each arm of which is divided at the end into two rounded branches or divisions.

The largest of the three orders into which the Fungi Imperfecti are divided, including various forms.

Government by a single person; undivided rule. Sydney Smith.

One of the twelve portions into which the year is divided; the twelfth part of a year, corresponding nearly to the length of a synodic revolution of the moon, -- whence the name. In popular use, a period of four weeks is often called a month.

or probability; practically sufficient; -- opposed to legal or demonstrable; as, a moral evidence; a moral certainty.

To provide with a motive; to move; impel; induce; incite. -- Mo`ti*va"tion (#), n. William James.