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WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
THESAURUS

# parameter

:
Noun
:
pa=ram=e=ter

## CIDE DICTIONARY

parametern. [Pref. para- + -meter: cf. F. paramètre.].
•  A constant number which is part of a theory, function, or calculation, whose value is not determined by the form of the theory or equation itself, and may in some cases be arbitrary assigned.  [PJC]
•  A term applied to some characteristic magnitude whose value, invariable as long as one and the same function, curve, surface, etc., is considered, serves to distinguish that function, curve, surface, etc., from others of the same kind or family.  [1913 Webster]
" The parameter of the principal axis of a conic section is called the latus rectum."  [1913 Webster]
•  Any constant number which is required to calculate values of observed phenomena according to a theory, but the value of which must be determined by experiment, and cannot be calculated from the fundamental assumptions of the theory. In general, a theory which has a large number of parameters, though it may accurately predict experimental results, is considered as having less explanatory power and as being less esthetically pleasing than a theory with fewer parameters.  [PJC]
•  The ratio of the three crystallographic axes which determines the position of any plane; also, the fundamental axial ratio for a given species.  [1913 Webster]
•  The limits, guidelines, or assumptions from within which an activity is carried out; as, new arrivals need to learn the parameters of the research in our department.  [PJC]
•  A variable used in a calculation within a computer program which must be assigned a value before the calculation can be performed; as, let's plug in the parameters and see what the result is.  [PJC]
•  A characteristic or element, especially one used as a criterion for evaluation or judgment; as, a useful parameter for determining efficiency.  [PJC]

## OXFORD DICTIONARY

parameter, n.
1 Math. a quantity constant in the case considered but varying in different cases.
2 a an (esp. measurable or quantifiable) characteristic or feature. b (loosely) a constant element or factor, esp. serving as a limit or boundary.

Derivative
parametric adj. parametrize v.tr. (also -ise).
Etymology
mod.L f. Gk para beside + metron measure

## THESAURUS

### parameter

barometer, boundaries, boundary condition, bounds, bourns, canon, catch, check, circumference, circumscription, clause, compass, condition, confines, coordinates, criterion, degree, donnee, edges, escalator clause, escape clause, escape hatch, fine print, fringes, gauge, given, graduated scale, grounds, joker, kicker, limitations, limiting condition, limits, marches, measure, metes, metes and bounds, model, norm, obligation, outlines, outskirts, pale, parameters, pattern, perimeter, periphery, prerequisite, provision, provisions, proviso, quantity, reading, readout, requisite, rule, saving clause, scale, sine qua non, skirts, small print, specification, standard, stipulation, string, terms, test, touchstone, type, ultimatum, value, verges, whereas, yardstick
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