Of or relating to the first portion of some extended thing.
The act of doing that which begins anything; commencement of an action, state, or space of time; entrance into being or upon a course; the first act, effort, or state of a succession of acts or states.
The initial portion of some extended thing.
That which is begun; a rudiment or element.
That which begins or originates something; the source or first cause.
The process in which all or a portion of liquid (in a container) is turned into vapour, in order to increase the concentration of solid matter in the mixture.
The process of a liquid converting to the gaseous state.