Principal

Principal Prin"ci*pal, a. [F., from L. principalis. See {Prince}.] 1. Highest in rank, authority, character, importance, or degree; most considerable or important; chief; main; as, the principal officers of a Government; the principal men of a state; the principal productions of a country; the principal arguments in a case. [1913 Webster]

Wisdom is the principal thing. --Prov. iv. 7. [1913 Webster]

2. Of or pertaining to a prince; princely. [A Latinism] [Obs.] --Spenser. [1913 Webster]

{Principal axis}. See {Axis of a curve}, under {Axis}.

{Principal axes of a quadric} (Geom.), three lines in which the principal planes of the solid intersect two and two, as in an ellipsoid.

{Principal challenge}. (Law) See under {Challenge}.

{Principal plane}. See {Plane of projection} (a), under {Plane}.

{Principal of a quadric} (Geom.), three planes each of which is at right angles to the other two, and bisects all chords of the quadric perpendicular to the plane, as in an ellipsoid.

{Principal point} (Persp.), the projection of the point of sight upon the plane of projection.

{Principal ray} (Persp.), the line drawn through the point of sight perpendicular to the perspective plane.

{Principal section} (Crystallog.), a plane passing through the optical axis of a crystal. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Synonyms:

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  • Principal — may refer to: Education The head of an educational institution: *Principal (school), head of a primary or secondary school *Principal (university), chief executive of a university **Dean (education), a person with significant authority **Provost… …   Wikipedia

  • Principal — Prin ci*pal, n. 1. A leader, chief, or head; one who takes the lead; one who acts independently, or who has controlling authority or influence; as, the principal of a faction, a school, a firm, etc.; distinguished from a {subordinate}, {abettor} …   The Collaborative International Dictionary of English

  • Principal — steht für eine alte Schreibweise von Prinzipal den Nachnamen von Victoria Principal (* 1946), US amerikanische Schauspielerin Diese Seite ist eine Begriffsklärung zur Unterscheidung mehrerer mit dems …   Deutsch Wikipedia

  • PRINCIPAL — ALE. adj. Qui est le premier, le plus considérable, le plus remarquable en son genre. Principal emploi. Son principal but. Les points et les articles principaux d un traité, d un contrat de mariage. C est là son principal défaut, sa principale… …   Dictionnaire de l'Academie Francaise, 7eme edition (1835)

  • principal — I. adjective Etymology: Middle English, from Anglo French, from Latin principalis, from princip , princeps Date: 14th century 1. most important, consequential, or influential ; chief < the principal ingredient > < the region s principal city > 2 …   New Collegiate Dictionary

  • PRINCIPAL — s. m. Celui qui a la direction d un collége. Le principal de Navarre. Monsieur le principal. Le père principal. On ne donne aujourd hui le titre de Principal qu aux chefs des colléges communaux …   Dictionnaire de l'Academie Francaise, 7eme edition (1835)

  • Principal components analysis — Principal component analysis (PCA) is a vector space transform often used to reduce multidimensional data sets to lower dimensions for analysis. Depending on the field of application, it is also named the discrete Karhunen Loève transform (KLT),… …   Wikipedia

  • Principal axes of a quadric — Principal Prin ci*pal, a. [F., from L. principalis. See {Prince}.] 1. Highest in rank, authority, character, importance, or degree; most considerable or important; chief; main; as, the principal officers of a Government; the principal men of a… …   The Collaborative International Dictionary of English

  • Principal axis — Principal Prin ci*pal, a. [F., from L. principalis. See {Prince}.] 1. Highest in rank, authority, character, importance, or degree; most considerable or important; chief; main; as, the principal officers of a Government; the principal men of a… …   The Collaborative International Dictionary of English

  • Principal challenge — Principal Prin ci*pal, a. [F., from L. principalis. See {Prince}.] 1. Highest in rank, authority, character, importance, or degree; most considerable or important; chief; main; as, the principal officers of a Government; the principal men of a… …   The Collaborative International Dictionary of English

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