释义 |
ba·sis I. \ˈbāsə̇s\ noun (plural ba·ses \-āˌsēz\) Etymology: Latin — more at base 1. a. : the bottom of anything considered as a foundation for the parts above : base, foot b. obsolete : the pedestal of a column, pillar, or statue < if no basis bear my rising name — Alexander Pope > c. : any of certain anatomical structures that function as bases: as (1) : the membranous or calcareous base by which a barnacle is attached to the substrate (2) : basipodite (3) : the articulated proximal part of the capitulum of a tick — called also basis capituli 2. : the principal component of anything : fundamental ingredient : base < a combination of fruit or fruit juices and sugar is the fundamental basis of jelly > 3. : something that supports or sustains anything immaterial : essence < his argument rested on a basis of conjecture > 4. a. : something on which anything is constructed or established < Indian trails … were the basis for many of their roads — American Guide Series: North Carolina > : the basic principle : groundwork < the frustrating task of putting international affairs on a permanent basis of law and order — A.E.Stevenson †1965 > b. : footing 6 < a club where everyone was on a first-name basis — J.P.Marquand > 5. a. : a rhythmic unit constituted by a given proportion of arsis to thesis without reference to the order or placement of long and short elements < trochaic and iambic feet represent the same basis > b. : a free first foot in some ancient verse that admits more variation from the norm of the line than appears in subsequent feet 6. : a glassy or felsitic noncrystalline granular material that is a last product of solidification of a volcanic rock and that forms a cement for earlier minerals 7. a. : the price difference between a specified grade of a commodity and a designated futures delivery b. : the actual yield on an investment in bonds c. : the original cost of property used in computing capital gains or losses for income tax purposes II. \ˈbäˌsēz\ plural of basi III. noun : a set of linearly independent vectors in a vector space such that any vector in the vector space can be expressed as a linear combination of them with appropriately chosen coefficients |