EXPONENTIAL a.
function. Exponential curve, a curve whose nature is defined by means of an exponential equation. -- Exponential equation, an equation which contains an exponential quantity, or in which the unknown quantity enters as an exponent. -- Exponential quantity (Math.), a quantity whose exponent is unknown or variable, as…
FIG n.
and Eve (Genesis iii.7), a covering for a thing that ought to be concealed; esp., an inadequate covering; a symbol for affected modesty. -- Fig marigold (Bot.), the name of several plants of the genus Mesembryanthemum, some of which are prized for the brilliancy and beauty of their flowers. -- Fig tree (Bot.), any tr…
FLAG n.
An aquatic plant, with long, ensiform leaves, belonging to either of the genera Iris and Acorus. Cooper's flag, the cat-tail (Typha latifolia), the long leaves of which are placed between the staves of barrels to make the latter water-tight. -- Corn flag. See under 2d Corn. -- Flag broom, a coarse of broom, originall…
FOIL n.
ounded or leaflike ornament, in windows, niches, etc. A group of foils is called trefoil, quatrefoil, quinquefoil, etc., according to the number of arcs of which it is composed. Foil stone, an imitation of a jewel or precious stone.
FUNCTION n.
x. Algebraic function, a quantity whose connection with the variable is expressed by an equation that involves only the algebraic operations of addition, subtraction, multiplication, division, raising to a given power, and extracting a given root; -- opposed to transcendental function. -- Arbitrary function. See unde…