Any structure or land feature which catches and holds water; the collection of such water.
A catchment area, or the people it serves.
To divide into catchment areas.
A leading or drawing off of water from a stream or source.
The act of tracing origin or descent.
The act of receiving anything from a source; the act of procuring an effect from a cause, means, or condition, as profits from capital, conclusions or opinions from evidence.
That from which a thing is derived.
That which is derived; a derivative; a deduction.
The state or method of being derived; the relation of origin when established or asserted.
Forming a new word by changing the base of another word or by adding affixes to it.
The operation of deducing one function from another according to a fixed definition, referred to as derivation or differentiation; this is the inverse operation to integration.
A drawing of humors or fluids from one part of the body to another, to relieve or lessen a morbid process.