specialist

n.

1. One who is devoted to a particular occupation or branch of study or research: "Specialists . . . tend to think in grooves" (Elaine Morgan).
2. A physician whose practice is limited to a particular branch of medicine or surgery, especially one who is certified by a board of physicians: a specialist in oncology.
3. Any of several noncommissioned ranks in the U.S. Army that correspond to that of corporal through sergeant first class.

specialist spe'cial·ist or spe'cial·is'tic adj.

A member of an exchange who acts as the market maker to facilitate the trading of a given stock. The specialist holds an inventory of the stock, posts the bid and ask prices, manages limit orders and executes trades. Specialists are also responsible for managing large movements by trading out of their own inventory. If there is a large shift in demand on the buy or sell side, the specialist will step in and sell out of their inventory to meet the demand until the gap has been narrowed.

Investopedia Says:
There is usually one specialist per stock who stands ready to step in and buy or sell as many shares as needed to ensure a fair and orderly market in that security.

Related Links:
Find out the various ways in which a broker can fill an order, which can affect costs. Understanding Order Execution
Can your forex broker offer you the most competitive pricing? Learn how the market's biggest players affect you. The Foreign Exchange Interbank Market

Member of a stock exchange who maintains a fair and orderly market in one or more securities. A specialist or Specialist Unit performs two main functions: executing Limit Orders on behalf of other exchange members for a portion of the Floor Broker's commission, and buying or selling-sometimes Selling Short-for the specialist's own account to counteract temporary imbalances in supply and demand and thus prevent wide swings in stock prices. The specialist is prohibited by exchange rules from buying for his own account when there is an unexecuted order for the same security at the same price in the Specialist's Book, the record kept of limit orders in each price category in the sequence in which they are received. Specialists must meet strict minimum capital requirements before receiving formal approval by the New York Stock Exchange. See also Negative Obligations; Specialist Block Purchase and Sale; Specialist's Short Sale Ratio.

n

Definition: expert
Antonyms: amateur, generalist, general practitioner

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n

A health care professional who is qualified to limit practice to a narrow spectrum of health care. A specialist usually has advanced clinical training and postgraduate education in the discipline or specialty.

A veterinarian whose practice is limited to a particular branch of medicine or surgery, especially one who, by virtue of advanced training, is certified by a specialty board as being qualified to so limit his/her practice.

Dansk (Danish)
n. - specialist, fagmand
adj. - specialist-, special-

Nederlands (Dutch)
specialist, kenner, specialistisch

Français (French)
n. - (Méd) spécialiste, spécialiste (de)
adj. - spécialisé

Deutsch (German)
n. - Facharzt, Spezialist
adj. - Spezial-

Ελληνική (Greek)
n. - ειδικός, σπεσιαλίστας, εμπειρογνώμονας
adj. - ειδικός, ειδικευμένος

Italiano (Italian)
specialista

Português (Portuguese)
n. - alguém que se dedica a um campo
adj. - especialista

Русский (Russian)
специалист, младший сержант

Español (Spanish)
n. - especialista, experto
adj. - especialista, especializado

Svenska (Swedish)
n. - specialist, fackman
adj. - special-, fack-

中文（简体）(Chinese (Simplified))
专科医师, 专家, 专业的, 专科的, 专家的, 有专门知识的

中文（繁體）(Chinese (Traditional))
n. - 專科醫師, 專家
adj. - 專業的, 專科的, 專家的, 有專門知識的

한국어 (Korean)
n. - 전문가, 특기병
adj. - 전문의, 전문화 경향이 있는, 전문가에 특유한

日本語 (Japanese)
n. - 専門家, 専門医

العربيه (Arabic)
‏(الاسم) اختصاصي (طبيب) , مختص (صفه) اخصائي‏

עברית (Hebrew)
n. - ‮מומחה, רופא מומחה, ספציאליסט‬
adj. - ‮מומחה‬

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Ac Slave Specialist	Antenna Specialist Dual Nmo