5. Nombre un, à la base de la formation des autres nombres : Le nombre peut être défini comme une collection d'unités.
6. Chacun des objets d'une collection, d'une production en série : Assiettes vendues à l'unité.Chaîne produisant 50 unités par jour.
7. Grandeur prise comme étalon de mesure des grandeurs de même espèce : Les unités monétaires des différents États.
8. Élément de base d'un ensemble de caractère structuré : La cellule, unité fondamentale des organismes vivants.
9. Structure organisée, cohérente au sein d'un ensemble plus vaste : Unité de production.Unité de recherche.
Géologie
10. Subdivision des différentes catégories stratigraphiques (ère, période, époque et âge).
Industrie
11. Groupe d'appareils, dans une usine, capables de réaliser une opération industrielle indépendamment des autres installations de cette usine.
Informatique
12. Partie d'un ordinateur effectuant une tâche donnée.
Marine
13. Appellation donnée à des bâtiments de la marine nationale, quelle que soit leur importance.
Métrologie
14. Grandeur particulière prise comme terme de comparaison avec des grandeurs de même espèce. (Les nombres qui résultent de ces comparaisons donnent les mesures de ces grandeurs.)
Militaire
15. Formation militaire constituée de façon permanente dans les armées de terre et de l'air. (On dit aussi unité organique, unité aérienne.)
Statistique
16. Unité statistique, fait élémentaire à étudier.
Expressions avec unité
Unité d'enseignement (UE),
dans une université, enseignement correspondant à une discipline et sanctionné par un contrôle des connaissances. (Elle a remplacé l'unité de valeur (UV).)
Biologie
Unité de l'individu,
maintien, entre les organes vitaux des êtres pluricellulaires, d'une relation de dépendance le plus souvent réciproque.
Économie
Unité de compte,
étalon de valeur servant à établir la valeur des dettes ou des créances, en les soustrayant aux fluctuations des monnaies nationales.
Enseignement
Unité de formation et de recherche (U.F.R.),
une des composantes de l'enseignement universitaire.
Unité d'enseignement et de recherche (U.E.R.),
cellule de base de l'enseignement universitaire. (Créées en 1968, les U.E.R. sont remplacées en 1985 par des U.F.R., par des instituts ou par des écoles.)
Finances
Unité budgétaire,
règle selon laquelle le budget est présenté au Parlement pour l'année à venir, dans un document unique et de façon détaillée.
Industrie
Unité pilote,
installation de laboratoire, ou semi-industrielle, reproduisant à petite échelle les conditions technico-économiques d'une fabrication.
Unité semi-industrielle,
installation reproduisant exactement les conditions de marche d'un procédé à étudier ou d'une fabrication à mettre au point, mais à une échelle réduite, par exemple 1 pour 1 000.
Informatique
Unité centrale,
partie d'un ordinateur comprenant les circuits arithmétiques, logiques et de contrôle.
Unité d'échange,
partie d'un ordinateur qui gère les opérations d'entrée-sortie.
Unité d'entrée,
périphérique permettant l'introduction de données dans un ordinateur.
Unité de sortie,
périphérique permettant l'impression ou l'enregistrement de résultats.
Unité de traitement ou unité arithmétique et logique,
partie d'un ordinateur effectuant les opérations arithmétiques et logiques.
Linguistique
Unité linguistique,
élément discret identifié à un certain niveau d'analyse et caractéristique de ce niveau. (Les phonèmes au niveau phonématique, les morphèmes au niveau morphématique, les phrases au niveau phrastique.)
Littérature
Règle des trois unités,
règle dramatique d'après laquelle la pièce doit se développer en une seule action principale (unité d'action), dans un lieu unique (unité de lieu), dans l'espace d'une journée (unité de temps), et qui régit le théâtre classique français au nom de la vraisemblance.
Mathématiques
Élément unité,
élément neutre, s'il existe, d'une opération interne notée multiplicativement. (On le note généralement 1.)
Matrice unité,
matrice (αij) carrée telle que αij = 1 si i = j, et αij = 0 si i ≠ j.
Métrologie
Système d'unités,
ensemble d'unités choisies de façon à simplifier certaines formules physiques reliant plusieurs grandeurs.
Unités de base ou unités fondamentales,
unités desquelles on dérive les autres unités d'un système.
Militaire
Grande unité,
formation militaire d'importance égale ou supérieure à la brigade.
Petite unité,
formation militaire d'importance inférieure à la brigade.
Unité de combat,
formation militaire qui est pourvue en permanence des moyens nécessaires à l'accomplissement de certaines missions de combat.
Pétrole
Unité de raffinage,
installation industrielle où s'effectue la transformation ou le traitement du pétrole par un procédé de raffinage.
Politique
Unité nationale,
cohésion des ressortissants d'un État, essentiellement invoquée lorsque l'existence de celui-ci est menacée de l'intérieur ou de l'extérieur.
Polymères
Unité de constitution,
synonyme de motif monomère.
Synonyme :
motif monomère.
Télévision
Unité de programme,
division administrative responsable, au sein d'une chaîne de télévision, du choix et de la diffusion d'un type donné d'émissions (variétés, documentaires, etc.).
Usinage
Unité d'usinage,
partie d'une machine spéciale, autonome et généralement standard, à commande électromécanique, hydraulique ou pneumatique, qui effectue une opération particulière (perçage, alésage, taraudage, etc.).
Antonin Artaud (Marseille 1896-Ivry-sur-Seine 1948) Avoir le sens de l'unité profonde des choses, c'est avoir le sens de l'anarchie, et de l'effort à faire pour réduire les choses en les ramenant à l'unité. Héliogabale ou l'Anarchiste couronné, Gallimard
Nicolas Boileau dit Boileau-Despréaux (Paris 1636-Paris 1711) Qu'en un lieu, qu'en un jour, un seul fait accompli Tienne jusqu'à la fin le théâtre rempli. L'Art poétique
Alphonse de Brédenbec de Châteaubriant (Rennes 1877-Kitzbühel, Autriche, 1951) La loi d'amour […] fait que chacun sent en soi l'immense unité humaine, et devient fort autant que tous ensemble. La Réponse du Seigneur, La Mappemonde
Charles Du Bos (Paris 1882-La Celle-Saint-Cloud 1939) Je suis une unité qui va bien ou une diversité qui va mal. Propos à Marie Gouhier
Blaise Pascal (Clermont, aujourd'hui Clermont-Ferrand, 1623-Paris 1662) La multitude qui ne se réduit pas à l'unité est confusion ; l'unité qui ne dépend pas de la multitude est tyrannie. Pensées, 871
Commentaire Chaque citation des Pensées porte en référence un numéro. Celui-ci est le numéro que porte dans l'édition Brunschvicg - laquelle demeure aujourd'hui la plus généralement répandue - le fragment d'où la citation est tirée.
« Qu'y a t il de plus tape à l'œil que le faux marbre ? ». Combien doit-on mettre de traits d'union dans cette phrase ?
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