‖n. [ Russ. badiaga. ] (Zool.) A fresh-water sponge (Spongilla), common in the north of Europe, the powder of which is used to take away the livid marks of bruises. [ 1913 Webster ]

a. [ Gr. brachy`s short + E. diagonal. ] Pertaining to the shorter diagonal, as of a rhombic prism. [ 1913 Webster ]

Brachydiagonal axis, the shorter lateral axis of an orthorhombic crystal. [ 1913 Webster ]

n. The shorter of the diagonals in a rhombic prism. [ 1913 Webster ]

n. See Cardiograph. [ 1913 Webster ]

n. [ Gr. kli`nein to incline + E. diagonal. ] (Crystallog.) That diagonal or lateral axis in a monoclinic crystal which makes an oblique angle with the vertical axis. See Crystallization. -- a. Pertaining to, or the direction of, the clinodiagonal. [ 1913 Webster ]

a. [ Gr. dia` through, at variance + &unr_; earth + &unr_; turning. ] (Bot.) Relating to, or exhibiting, diageotropism. [ 1913 Webster ]

n. (Bot.) The tendency of organs (as roots) of plants to assume a position oblique or transverse to a direction towards the center of the earth. [ 1913 Webster ]

n. [ Gr. &unr_; to engrave; dia` through + &unr_; to carve. ] An intaglio. Mollett.

{ } a. Represented or formed by depressions in the general surface; as, diaglyphic sculpture or engraving; -- opposed to anaglyphic. [ 1913 Webster ]

v. t. & i. To ascertain by diagnosis; to diagnosticate. See Diagnosticate. [ 1913 Webster ]

n. the act or process of identifying the nature or cause of some phenomenon.
Syn. -- diagnosis. [ WordNet 1.5 ]

n.; pl. Diagnoses [ NL., fr. Gr. &unr_;, fr. &unr_; to distinguish; dia` through, asunder + &unr_; to know. See Know. ] 1. (Med.) The art or act of recognizing the presence of disease from its signs or symptoms, and deciding as to its character; also, the decision arrived at. [ 1913 Webster ]

2. Hence, the act or process of identifying the nature or cause of some phenomenon, especially the abnormal behavior of an animal or artifactual device; as, diagnosis of a vibration in an automobile; diagnosis of the failure of a sales campaign; diagnosis of a computer malfunction. [ PJC ]

3. Scientific determination of any kind; the concise description of characterization of a species. [ 1913 Webster ]

4. Critical perception or scrutiny; judgment based on such scrutiny; esp., perception of, or judgment concerning, motives and character. [ 1913 Webster ]

The quick eye for effects, the clear diagnosis of men's minds, and the love of epigram. Compton Reade. [ 1913 Webster ]

My diagnosis of his character proved correct. J. Payn. [ 1913 Webster ]

Differential diagnosis (Med.), the determination of the distinguishing characteristics as between two similar diseases or conditions. [ 1913 Webster ]

a. [ Gr. &unr_; able to distinguish, fr. &unr_;: cf. F. diagnostique. ] Pertaining to, or furnishing, a diagnosis; indicating the nature of a disease. [ 1913 Webster ]

n. The mark or symptom by which one disease is known or distinguished from others. [ 1913 Webster ]

v. t. & i. [ From Diagnostic. ] To make a diagnosis of; to recognize by its symptoms, as a disease. [ 1913 Webster ]

n. That part of medicine which has to do with ascertaining the nature of diseases by means of their symptoms or signs. [ 1913 Webster ]

His rare skill in diagnostics. Macaulay. [ 1913 Webster ]

n. [ Gr. &unr_; to transmit + -meter. ] A sort of electroscope, invented by Rousseau, in which the dry pile is employed to measure the amount of electricity transmitted by different bodies, or to determine their conducting power. Nichol. [ 1913 Webster ]

a. [ L. diagonalis, fr. Gr. &unr_; from to angle; dia` through + &unr_; an angle; perh. akin to E. knee: cf. F. diagonal. ] (Geom.) Joining two not adjacent angles of a quadrilateral or multilateral figure; running across from corner to corner; crossing at an angle with one of the sides. [ 1913 Webster ]

Diagonal bond (Masonry), herringbone work. See Herringbone, a. --
Diagonal built (Shipbuilding), built by forming the outer skin of two layers of planking, making angles of about 45° with the keel, in opposite directions. --
Diagonal cleavage. See under Cleavage. --
Diagonal molding (Arch.), a chevron or zigzag molding. --
Diagonal rib. (Arch.) See Cross-springer. --
Diagonal scale, a scale which consists of a set of parallel lines, with other lines crossing them obliquely, so that their intersections furnish smaller subdivisions of the unit of measure than could be conveniently marked on a plain scale. --
Diagonal stratification. (Geol.) Same as Cross bedding, under Cross, a. [ 1913 Webster ]

n. 1. A right line drawn from one angle to another not adjacent, of a figure of four or more sides, and dividing it into two parts. [ 1913 Webster ]

2. (Engin.) A member, in a framed structure, running obliquely across a panel. [ 1913 Webster ]

3. A diagonal cloth; a kind of cloth having diagonal stripes, ridges, or welts made in the weaving. [ 1913 Webster ]

adj. (Math.) able to be diagonalized; -- of a matrix. [ PJC ]

v. t. (Math.) to transform a matrix to a diagonal matrix. [ WordNet 1.5 ]

adv. In a diagonal direction. [ 1913 Webster ]

a. Diagonal; diametrical; hence; diametrically opposed. [ Obs. ] [ 1913 Webster ]

Sin can have no tenure by law at all, but is rather an eternal outlaw, and in hostility with law past all atonement; both diagonal contraries, as much allowing one another as day and night together in one hemisphere. Milton. [ 1913 Webster ]

n. [ Gr. &unr_;, fr. &unr_; to mark out by lines; dia` through + &unr_; to draw, write: cf. F. diagramme. See Graphic. ] 1. (Geom.) A figure or drawing made to illustrate a statement, or facilitate a demonstration; a plan. [ 1913 Webster ]

2. Any simple drawing made for mathematical or scientific purposes, or to assist a verbal explanation which refers to it; a mechanical drawing, as distinguished from an artistical one. [ 1913 Webster ]

Indicator diagram. (Steam Engine) See Indicator card, under indicator [ 1913 Webster ]

v. t. To put into the form of a diagram. [ 1913 Webster ]

a. Pertaining to, or of the nature of, a diagram; showing by diagram. -- Di`a*gram*mat"ic*ly adv. [1913 Webster]

n. [ Gr. &unr_; to draw: cf. F. diagraphe. See Diagram. ] A drawing instrument, combining a protractor and scale.

{ } a. [ Cf. F. diagraphique. ] Descriptive. [ 1913 Webster ]

n. The art or science of descriptive drawing; especially, the art or science of drawing by mechanical appliances and mathematical rule. [ 1913 Webster ]

n. [ Macro- + diagonal. ] (Crystallog.) The longer of two diagonals, as of a rhombic prism. See Crystallization. [ 1913 Webster ]

n. [ Ortho- + diagonal. ] (Crystallog.) The diagonal or lateral axis in a monoclinic crystal which is at right angles with the vertical axis. [ 1913 Webster ]