Amido acid, an acid in which a portion of the nonacid hydrogen has been replaced by the amido group. The amido acids are both basic and acid.Amido group, amidogen, NH2.

(A*mid"o*gen) n. [Amide + - gen.] (Chem.) A compound radical, NH2, not yet obtained in a separate state, which may be regarded as ammonia from the molecule of which one of its hydrogen atoms has been removed; — called also the amido group, and in composition represented by the form amido.

(A*mid"ships) adv. (Naut.) In the middle of a ship, with regard to her length, and sometimes also her breadth. Totten.

(A*midst" A*mid") prep. [OE. amidde, amiddes, on midden, AS. on middan, in the middle, fr. midde the middle. The s is an adverbial ending, originally marking the genitive; the t is a later addition, as in whilst, amongst, alongst. See Mid.] In the midst or middle of; surrounded or encompassed by; among. "This fair tree amidst the garden." "Unseen amid the throng." "Amidst thick clouds." Milton. "Amidst acclamations." "Amidst the splendor and festivity of a court." Macaulay.

But rather famish them amid their plenty.

Syn.Amidst, Among. These words differ to some extent from each other, as will be seen from their etymology. Amidst denotes in the midst or middle of, and hence surrounded by; as, this work was written amidst many interruptions. Among denotes a mingling or intermixing with distinct or separable objects; as, "He fell among thieves." "Blessed art thou among women." Hence, we say, among the moderns, among the ancients, among the thickest of trees, among these considerations, among the reasons I have to offer. Amid and amidst are commonly used when the idea of separate or distinguishable objects is not prominent. Hence, we say, they kept on amidst the storm, amidst the gloom, he was sinking amidst the waves, he persevered amidst many difficulties; in none of which cases could among be used. In like manner, Milton speaks of Abdiel, —

The seraph Abdiel, faithful found;
Among the faithless faithful only he,

because he was then considered as one of the angels. But when the poet adds, —

From amidst them forth he passed,

we have rather the idea of the angels as a collective body.

Those squalid cabins and uncleared woods amidst which he was born.

(Am"ine) n. [Ammonia + - ine.] (Chem.) One of a class of strongly basic substances derived from ammonia by replacement of one or more hydrogen atoms by a basic atom or radical.

(Am"i*oid) a. (Zoöl.) Like or pertaining to the Amioidei.n. One of the Amioidei.

(||Am`i*oi"de*i) n. pl. [NL., fr. Amia + -oid.] (Zoöl.) An order of ganoid fishes of which Amia is the type. See Bowfin and Ganoidei.

(||A*mir") n. Same as Ameer.

Amidin to Amorphous

(Am"i*din) n. [Cf. F. amidine, fr. amido starch, fr. L. amylum, Gr. fine meal, neut. of not ground at the mill, — hence, of the finest meal; 'a priv. + mill. See Meal.] (Chem.) Start modified by heat so as to become a transparent mass, like horn. It is soluble in cold water.

(A*mi"do) a. [From Amide.] (Chem.) Containing, or derived from, amidogen.

  By PanEris using Melati.

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