Definitions for "Spontaneous"
Proceeding from, or acting by, internal impulse, energy, or natural law, without external force; as, spontaneous motion; spontaneous growth.
occuring without outside influence.
A spontaneous process is defined as one which will either occur immediately at room temperature, or which, once initiated by heating, will sustain itself until the start materials are exhausted.
Keywords:  germ, pasteur, louis, doctrine, matter
Generation the theory that decaying matter turns into germs
Generation  - The development of living organisms from non-living matter. Louis Pasteur proved that spontaneous generation did not occur regularly. He is quoted as saying, "Life is a germ, and a germ is Life. Never will the doctrine of spontaneous generation recover from the mortal blow of this simple experiment."
Proceeding from natural feeling, temperament, or disposition, or from a native internal proneness, readiness, or tendency, without constraint; as, a spontaneous gift or proposition.
a miscarriage or the unintended termination of a pregnancy before the twentieth week of gestation;
Produced without being planted, or without human labor; as, a spontaneous growth of wood.
produced without being planted or without human labor; "wild strawberries"
Keywords:  lib, remarks, few, advance, written
said or done without having been planned or written in advance; "he made a few ad-lib remarks"