DISCONTINUOUS a.
), a function which for certain values or between certain values of the variable does not vary continuously as the variable increases. The discontinuity may, for example, consist of an abrupt change in the value of the function, or an abrupt change in its law of variation, or the function may become imaginary.…
FINGER n.
(Mus.), the part of a stringed instrument against which the fingers press the strings to vary the tone; the keyboard of a piano, organ, etc.; manual. -- Finger bowl or glass, a bowl or glass to hold water for rinsing the fingers at table. -- Finger flower (Bot.), the foxglove. -- Finger grass (Bot.), a kind of gras…