center

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noun

1. A point or an area equidistant from all sides of something: median, middle, midpoint, midst. See edge/center.
2. A place of concentrated activity, influence, or importance: focus, headquarters, heart, hub, seat. See edge/center.
3. A point of origin from which ideas or influences, for example, originate: bottom, core, focus, heart, hub, quick, root. See start/end.

verb

To direct toward a common center: channel, concentrate, converge, focalize, focus. See edge/center.

adjective

At, in, near, or being the center: central, medial, median, mid, middle. See edge/center.

Idioms beginning with center:
center of attraction, the

In addition to the idiom beginning with center, also see front and center.

Definition: middle
Antonyms: bordering, edging, exterior, marginal, outside, peripheral

n

Definition: middle point
Antonyms: border, boundary, edge, exterior, exteriority, margin, outside, outskirts, periphery, rim, surroundings

v

Definition: concentrate, draw together
Antonyms: disperse, dissipate

1. The center ply in plywood.
2. The core in a laminated construction.
3. Centering.
4. The center about which an arc of a circle is drawn, equidistant from all points on the arc.

A point from which a process starts, especially a plexus or ganglion giving off nerves that control a function.

• accelerating c. — one in the brainstem involved in acceleration of heart action.
• appetite c. — located in the hypothalamus; controls appetite.
• auditory c. — the center for hearing, in the more anterior of the transverse temporal gyri.
• cardioinhibitory c. — one in the medulla oblongata that exerts an inhibitory influence on the heart.
• deglutition c. — a nerve center in the medulla oblongata that controls swallowing.
• diaphragmatic c. — see diaphragmatic tendon.
• emetic c. — located in the reticular formation of the brainstem, this center controls vomiting.
• eructation c. — controls eructation in ruminants; located in the medulla oblongata.
• expiratory c. — one of the four respiratory centers (see below).
• germinal c. — the area in the center of a lymph node containing aggregations of actively proliferating lymphocytes.
• gustatory c. — the cerebral center supposed to control taste.
• inspiratory respiratory c. — one of the four respiratory centers.
• lymph node germinal c. — centers in lymph nodes where lymphocytes are produced.
• medullary respiratory c. — the center in the medulla oblongata that coordinates respiratory movements.
• motor c. — any center that originates, controls, inhibits or maintains motor impulses.
• nerve c. — a collection of nerve cells in the central nervous system that are associated together in the performance of some particular function.
• c. of ossification — see ossification center.
• perineal c. — see perineal body.
• reflex c. — any nerve center at which afferent sensory information is converted into efferent motor impulses.
• respiratory c's — a series of the centers (the apneustic, pneumotaxic and medullary respiratory centers) in the medulla and pons that coordinate respiratory movements.
• c.-surround retinal organization — the arrangement of cells in the receptive field of the retina; the sensitivity of a certain spot in the retina is affected by what is occurring in adjacent areas.
• swallowing c. — deglutition center.
• thermoregulatory c's — hypothalamic centers regulating the conservation and dissipation of heat.
• vasomotor c. — a combination of two centers in the reticular formation of the brainstem; includes a pressor and a depressor center.
• vomiting c. — see emetic center (above).

• Philosophies, Principles, and Parties - center: principles midway between liberal and conservative views
• Basketball
• Football
• Hockey
• Soccer
• Fixed Positions and Points - center: middle, esp. point around which circle is drawn

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The term center or centre is used in various contexts in abstract algebra to denote the set of all those elements that commute with all other elements. It is often denoted Z, from German Zentrum, meaning "center". More specifically:

• The center of a group G consists of all those elements x in G such that xg = gx for all g in G. This is a normal subgroup of G.
• The center of a ring R is the subset of R consisting of all those elements x of R such that xr = rx for all r in R. The center is a commutative subring of R, and R is an algebra over its center.
• The center of an algebra A consists of all those elements x of A such that xa = ax for all a in A. See also: central simple algebra.
• The center of a Lie algebra L consists of all those elements x in L such that [x,a] = 0 for all a in L. This is an ideal of the Lie algebra L.
• The center of a monoidal category C consists of pairs (A,u) where A is an object of C, and a natural isomorphism satisfying certain axioms.

References

Modern Algebra, R. Durbin, 3rd edition (1992), page 118, exercise 22.22

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Dansk (Danish)
n. - centrum, midtpunkt, fyld
v. tr. - centrere
v. intr. - forene sig, være forenet, koncentrere sig

idioms:

• center of gravity    tyngdepunkt
• center of mass    tyngdepunkt
• center stage    scenens centrum, midtpunkt

Nederlands (Dutch)
centrum, middelpunt, voorzet, haard, voorzetten, centreren, als middelpunt hebben

Français (French)
n. - centre, milieu, siège, quartier (des affaires, commercial), (Pol) centre
v. tr. - (Comput, Tech) centrer, (Cin, Phot) centrer, cadrer
v. intr. - (Comput, Tech) centrer, (Cin, Phot) centrer, cadrer

idioms:

• center of gravity    centre de gravité
• center of mass    centre de masse
• center stage    centre de la scène

Deutsch (German)
n. - Zentrum, Mittelpunkt, Stadtmitte
v. - zentrieren, flanken, vorlegen

idioms:

• center of gravity    Schwerpunkt
• center of mass    Massenzentrum, Trägheitszentrum
• center stage    Bühnenmitte, Mittelpunkt der Aufmerksamkeit

Ελληνική (Greek)
n. - κέντρο, επίκεντρο, (αθλητ.) σέντρα
v. - κεντράρω, βάζω στο κέντρο, συγκεντρώνω, επικεντρώνω

idioms:

• center of gravity    κέντρο βάρους
• center of mass    κέντρο μάζας
• center stage    κεντρική σκηνή, επίκεντρο προσοχής
• drop-in centre    κέντρο περιστασιακής υποστήριξης

Italiano (Italian)
centrare, centro, fulcro, perno

idioms:

• center of gravity    baricentro
• center of mass    centro di massa
• center stage    centro dell'attenzione

Português (Portuguese)
n. - centro (m), núcleo (m)
v. - centralizar

idioms:

• center of gravity    centro (m) de gravidade
• center of mass    centro (m) de massa
• center stage    palco (m) central

Русский (Russian)
помещать в центре, пасовать на центр, центр

idioms:

• center of gravity    центр тяжести
• center of mass    центр тяжести
• center stage    в центре эстрады, выделяет на показ

Español (Spanish)
n. - centro, centro de la ciudad, centro motor
v. tr. - centrar, pasar al centro
v. intr. - centrarse, pasarse al centro

idioms:

• center of gravity    centro de gravedad
• center of mass    centro de masa, centro del cuerpo
• center stage    centro del escenario, primer plano

Svenska (Swedish)
n. - centrum, fyllning (om choklad mm), dubb (tekn.)
v. - ställa i mittpunkten, centrera, koncentrera

中文（简体）(Chinese (Simplified))
中心, 中锋, 中心点, 集中, 定中心, 使聚集在一点, 居中, 被置于中心, 有中心

idioms:

• center of gravity    重心
• center of mass    质心
• center stage    中心舞台

中文（繁體）(Chinese (Traditional))
n. - 中心, 中鋒, 中心點
v. tr. - 集中, 定中心, 使聚集在一點
v. intr. - 居中, 被置於中心, 有中心

idioms:

• center of gravity    重心
• center of mass    質心
• center stage    中心舞台

한국어 (Korean)
n. - 중심, 중심지, 중도파
v. tr. - 중심에 두다, 집중시키다
v. intr. - 중심에 있다

日本語 (Japanese)
n. - 中心, 中央, 中心地, 総合施設, センター, 中道派, 中央部隊, センターへのボール, 迫枠
v. - 中心に置く, 集中させる, 一点に集まる, 集中する

idioms:

• center of gravity    重心, 興味の中心
• center of mass    質量中心, 重心
• center stage    ステージ中央
• drop-in centre    ホームレスを収容する一時施設

العربيه (Arabic)
‏(الاسم) مركز, وسط (فعل) وضع في الوسط, تركز‏

עברית (Hebrew)
n. - ‮אמצע, מרכז, ציר, קבוצה פוליטית הנמצאת בין הימין לשמאל, מילוי בשוקולד, שחקן מרכז שדה, גרעין או מקור, של מרכז‬
v. tr. - ‮שם במרכז, העביר כדור למרכז, מירכז (עגת ספורט), סימן כמרכז‬
v. intr. - ‮התרכז‬

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