extra

a. Beyond what is due, usual, expected, or necessary; additional; supernumerary; also, extraordinarily good; superior; as, extra work; extra pay. “By working extra hours.” H. Spencer. [ 1913 Webster ]

‖ [ L., fr. exter. See Exterior. ] A Latin preposition, denoting beyond, outside of; -- often used in composition as a prefix signifying outside of, beyond, besides, or in addition to what is denoted by the word to which it is prefixed. [ 1913 Webster ]

a. (Anat.) Situated outside of a joint.

{ a. (Bot.) Growing outside of the axils; as, an extra-axillary bud. [ 1913 Webster ]

a. (Anat.) Outside of the branchial arches; -- said of the cartilages thus placed in some fishes. [ 1913 Webster ]

a. (Anat.) Situated outside of a capsule, esp. outside the capsular ligament of a joint. [ 1913 Webster ]

adj. located or occurring outside of a living cell or cells; as, extracellular fluid. Opposite of intracellular. [ WordNet 1.5 ]

n. 1. That which is extracted or drawn out. [ 1913 Webster ]

2. A portion of a book or document, separately transcribed; a citation; a quotation. [ 1913 Webster ]

3. A decoction, solution, or infusion made by dissolving out from any substance that which gives it its essential and characteristic virtue; essence; as, extract of beef; extract of dandelion; also, any substance so extracted, and characteristic of that from which it is obtained; as, quinine is the most important extract of Peruvian bark. [ 1913 Webster ]

4. (Med.) A solid preparation obtained by evaporating a solution of a drug, etc., or the fresh juice of a plant; -- distinguished from an abstract. See Abstract, n., 4. [ 1913 Webster ]

5. (Old Chem.) A peculiar principle once erroneously supposed to form the basis of all vegetable extracts; -- called also the extractive principle. [ Obs. ] [ 1913 Webster ]

6. Extraction; descent. [ Obs. ] South. [ 1913 Webster ]

7. (Scots Law) A draught or copy of writing; certified copy of the proceedings in an action and the judgement therein, with an order for execution. Tomlins. [ 1913 Webster ]

Fluid extract (Med.), a concentrated liquid preparation, containing a definite proportion of the active principles of a medicinal substance. At present a fluid gram of extract should represent a gram of the crude drug.