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wo planes that are separated and indefinitely small distance. In the calculus, element is sometimes used as synonymous with differential.

sac or vesicle (Bot.), the vesicle within which the embryo is developed in the ovule; -- sometimes called also amnios sac, and embryonal sac.

ry wheel, a wheel containing emery, or having a surface of emery. In machine shops, it is sometimes called a buff wheel, and by the manufacturers of cutlery, a glazer.

enjoyment of the property on condition of taking care of the estate and paying taxes, and sometimes a small rent. Heumann.

cause to be engaged in doing something; -- often followed by in, about, on, or upon, and sometimes by to; as: (a) To make use of, as an instrument, a means, a material, etc., for a specific purpose; to apply; as, to employ the pen in writing, bricks in building, words and phrases in speaking; to employ the mind; to em…

tion it is commonly changed to em- before p, b, and m, as in employ, embody, emmew. It is sometimes used to give a causal force, as in enable, enfeeble, to cause to be, or to make, able, or feeble; and sometimes merely gives an intensive force, as in enchasten. See In-.

A fossil crinoid, esp. one belonging to, or resembling, the genus Encrinus. Sometimes used in a general sense for any crinoid.

An endemic disease. Fear, which is an endemic latent in every human heart, sometimes rises into an epidemic. J. B. Heard.

Fully; quite; -- used to express slight augmentation of the positive degree, and sometimes equivalent to very; as, he is ready enough to embrace the offer. I know you well enough; you are Signior Antonio. Shak. Thou knowest well enough . . . that this is no time to lend money. Shak.

e a part; to become a partaker or participant; to share; to engage; -- usually with into; sometimes with on or upon; as, a ball enters into the body; water enters into a ship; he enters into the plan; to enter into a quarrel; a merchant enters into partnership with some one; to enter upon another's land; the boy enters…

d by h . The entropy is regarded as measured from some standard temperature and pressure. Sometimes called the thermodynamic function. The entropy of the universe tends towards a maximum. Clausius.

A work of earth, in the form of a single parapet or of a small rampart. It is sometimes raised in the ditch and sometimes beyond it. Wilhelm.

of the brain next behind the midbrain, including the cerebellum and pons; the hindbrain. Sometimes abbreviated to epen.

the masculine or feminine, to indicate animals of both sexes; as bos, for the ox and cow; sometimes applied to eunuchs and hermaphrodites.

Pertaining to a small Wormian bone sometimes present in the human skull between the parietal and the great wing of the sphenoid. -- n.

c. It often includes the epidermis (i. e., keratin-producing epithelial cells), and it is sometimes restricted to the alimentary canal, the glands and their appendages, -- the term endothelium being applied to the lining membrane of the blood vessels, lymphatics, and serous cavities.

n these instants as noted by two observers. It is usually only a fraction of a second; -- sometimes applied loosely to differences of judgment or method occasioned by temperamental qualities of individuals. -- Theory of equations (Math.), the branch of algebra that treats of the properties of a single algebraic equati…

object whose right ascension and declination are known. The motion in right ascension is sometimes communicated by clockwork, so as to keep the object constantly in the field of the telescope. Called also an equatorial telescope.

An avenging deity; one of the Furies; sometimes, conscience personified. [Written also Erinnys.]

observed value of a quantity and that which is taken or computed to be the true value; -- sometimes called residual error.