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name of several aromatic labiate plants, mostly of the genus Mentha, yielding odoriferous essential oils by distillation. See Mentha.

et, and then pouring the molten metal into a mold lined with a special mixture consisting essentially of molasses and ground burnt fire clay; also, a casting made by this process; -- called also wrought-iron casting.

An essential element; a deciding point, fact, or consideration; an essential or influential circumstance.

Essential element, or constituent element. I shall state the several momenta of the distinction in separate propositions. Sir W. Hamilton.

etaining the same form throughout the various stages of development; of the same or of an essentially similar type of structure; -- opposed to dimorphic, trimorphic, and polymorphic.

To destroy the active powers or essential qualities of; to change by chemical action. [Obs.] Chaucer. Quicksilver is mortified with turpentine. Bacon. He mortified pearls in vinegar. Hakewill.

ed tteth, but they had paddlelike feet. Some of them were over fifty feet long. They are, essentially, fossil sea serpents with paddles. Called also Pythonomarpha, and Mosasauria.

To be morally required; to be necessary or essential to a certain quality, character, end, or result; as, he must reconsider the matter; he must have been insane. Likewise must the deacons be grave. 1 Tim. iii. 8. Morover, he [a bishop] must have a good report of them which are without. 1 Tim. iii. 7.…

e quality of being mutable, or subject to change or alteration, either in form, state, or essential character; susceptibility of change; changeableness; inconstancy; variation. Plato confessed that the heavens and the frame of the world are corporeal, and therefore subject to mutability. Stillingfleet.…

To cut off or remove a limb or essential part of; to maim; to cripple; to hack; as, to mutilate the body, a statue, etc.

The act of mutilating, or the state of being mutilated; deprivation of a limb or of an essential part.

The essential material of muscle fibers.

A hypothetical radical regarded as the essential residue of myricin; -- called also melissyl.

A hydrocarbon radical regarded as the essential residue of naphthalene.

A bitter crystalline substance constituting the essential principle of Natal aloes. Cf. Aloon.

ining to the constitution of a thing; belonging to native character; according to nature; essential; characteristic; not artifical, foreign, assumed, put on, or acquired; as, the natural growth of animals or plants; the natural motion of a gravitating body; natural strength or disposition; the natural heat of the body;…

make a person or thing what it is, as distinct from others; native character; inherent or essential qualities or attributes; peculiar constitution or quality of being. Thou, therefore, whom thou only canst redeem, Their nature also to thy nature join, And be thyself man among men on earth. Milton.

s, massage, etc.; hence, any similar treatment using waters artificially charged with the essential ingredients of the natural mineral waters of Bad Nauheim. Hence, Nauheim bath, etc.

sed with, without preventing the attainment of a desired result; indispensable; requiste; essential. "'T is necessary he should die." Shak. A certain kind of temper is necessary to the pleasure and quiet of our minds. Tillotson.

One of the zooids of certain Siphonophora, having somewhat the form, and the essential structure, of the bell of a jellyfish, and acting as a swimming organ.