restriction point — a checkpoint late in the G1 phase of the cell cycle after which the cell is irreversibly committed to entering the S phase; faulty regulation of passage through the restriction point contributes to cell transformation and is a common cause of… … Medical dictionary
restriction point — (of cell cycle) A point, late in G1, after which the cell must, normally, proceed through to division at its standard rate … Dictionary of molecular biology
restriction — [ rɛstriksjɔ̃ ] n. f. • 1380; restrinction méd. « resserrement » 1314; bas lat. restrictio 1 ♦ Ce qui restreint le développement, la portée de qqch. (condition, exception). Il faut apporter des restrictions à ce principe. Émettre une restriction … Encyclopédie Universelle
Point de ramification — Point de branchement En analyse complexe, le point de branchement ou point de ramification est un point singulier d une fonction analytique complexe multiforme, telle que la fonction racine n ième ou le logarithme complexe. En ce point s… … Wikipédia en Français
Point (coat color) — Point coloration refers to animal coat coloration with a pale body and relatively darker extremities, i.e. the face, ears, feet, tail, and (in males) scrotum. It is most recognized as the coloration of Siamese and other breeds of cat, but can be… … Wikipedia
Point group — The Bauhinia blakeana flower on the Hong Kong flag has C5 symmetry; the star on each petal has D5 symmetry. In geometry, a point group is a group of geometric symmetries (isometries) that keep at least one point fixed. Point groups can exist in a … Wikipedia
Restriction of Hazardous Substances Directive — European Union directive: Directive 2002/95/EC Directive on the restriction of the use of certain hazardous substances in electrical and electronic equipment Made by Council Parliament … Wikipedia
Point groups in three dimensions — In geometry, a point group in three dimensions is an isometry group in three dimensions that leaves the origin fixed, or correspondingly, an isometry group of a sphere. It is a subgroup of the orthogonal group O(3), the group of all isometries… … Wikipedia
Point groups in two dimensions — In geometry, a point group in two dimensions is an isometry group in two dimensions that leaves the origin fixed, or correspondingly, an isometry group of a circle. It is a subgroup of the orthogonal group O(2), the group of all isometries which… … Wikipedia
restriction — (rè stri ksion ; en vers, de quatre syllabes) s. f. Condition qui restreint. • Entendez toujours, s il vous plaît, mademoiselle, les louanges que je vous donne, avec la restriction que je dois mettre, vous connaissant comme je fais, VOIT. Lett … Dictionnaire de la Langue Française d'Émile Littré
