grade

   1. a unit of angle measurement equal to 1/400 circle, 0.01 right angle, 0.9°, or 54'. This unit was introduced in France, where it is called the grade, in the early years of the metric system. The grad is the English version, apparently introduced by engineers around 1900. The name gon is used for this unit in German, Swedish, and other northern European languages in which the word grad means degree. Although many calculators will display angle measurements in grads as well as degrees or radians, it is difficult to find actual applications of the grad today.
   2. a measure of the steepness of a slope, such as the slope of a road or a ramp. Usually stated as a percentage in the U.S, the grade is the same quantity known as the slope in mathematics: the amount of (vertical) change in elevation per unit distance horizontally ("rise over run"). Thus a 5% grade has an elevation gain of 0.05 meter for each meter of horizontal distance, or 0.05 foot for each foot of horizontal distance. Grades are also stated as ratios (1/20 grade or 1 in 20 grade) and in some countries as a permillage (50o/oo grade). The angle of inclination, in grads or grades1, is not equal to the percentage grade in this sense: for a 5% grade the angle of inclination is about 2.86° or 3.18 grads.
   3. a measure of quality for ball bearings. A bearing of grade g is required to be spherical to an accuracy of g parts per million (g 10-6). Thus lower grade numbers represent better bearings; a 25 grade bearing is spherical to within 25 ppm, but a 1000 grade bearing is only spherical to within 1000 ppm, or 0.1%.

Dictionary of units of measurement. 2015.

Synonyms:

Look at other dictionaries:

  • grade — grade; grade·abil·i·ty; grav·i·grade; or·tho·grade; pha·lan·gi·grade; pro·no·grade; rec·ti·grade; re·grade; ret·ro·grade·ly; sub·grade; tal·i·grade; un·gu·li·grade; an·te·grade; mul·ti·grade; posi·grade; an·ter·o·grade; cen·ti·grade; de·grade;… …   English syllables

  • Grade II — Libelle …   Deutsch Wikipedia

  • Grade — (gr[=a]d), n. [F. grade, L. gradus step, pace, grade, from gradi to step, go. Cf. {Congress}, {Degree}, {Gradus}.] 1. A step or degree in any series, rank, quality, order; relative position or standing; as, grades of military rank; crimes of… …   The Collaborative International Dictionary of English

  • -grade — ♦ Élément, du lat. gradus, de gradi « marcher » : digitigrade, plantigrade. grade élément, du lat. gradi, marcher . ⇒ GRADE, élém. formant Élém. terminal empr. au lat. gradus de gradus « pas, posture, degré » et qui sert à former des adj. et …   Encyclopédie Universelle

  • Grade — ist der Familienname folgender Personen: Chaim Grade (1910–1982), litauischer Schriftsteller Hans Grade (1879–1946), deutscher Flugzeugkonstrukteur Lew Grade (1906–1998), britischer Filmproduzent Michael Grade (* 1943), britischer… …   Deutsch Wikipedia

  • grade — [grād] n. [Fr < L gradus, a step, degree, rank < gradi, to step, walk < IE base * ghredh , to stride > Goth griths, step] 1. any of the stages in an orderly, systematic progression; step; degree 2. a) a degree or rating in a scale… …   English World dictionary

  • Grade — Freguesia de Portugal …   Wikipedia Español

  • grade — m. grade. Aut en grade : élevé en grade …   Diccionari Personau e Evolutiu

  • grade — ► NOUN 1) a specified level of rank, quality, proficiency, or value. 2) a mark indicating the quality of a student s work. 3) N. Amer. (with specifying ordinal number) those pupils in a school who are grouped by age or ability for teaching at a… …   English terms dictionary

  • grade — [n1] rank, step brand, caliber, category, class, classification, condition, degree, division, echelon, estate, form, gradation, group, grouping, league, level, mark, notch, order, pigeonhole*, place, position, quality, rung*, size, stage,… …   New thesaurus

  • grade — GRADE. s. m. Dignité, degré d honneur. Il a esté eslevé au plus haut grade. il est monté à un nouveau grade …   Dictionnaire de l'Académie française

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.