fecundation

n 1: creation by the union of sperm or pollen with an animal or

plant or egg cell [syn: {fertilization}, {fertilisation},

{impregnation}]

2: making fertile as by applying fertilizer or manure [syn: {fertilization},

{dressing}]

foundation

The axiom of foundation states that the membership relation is

well founded, i.e. that any non-empty collection Y of sets has

a member y which is disjoint from Y. This rules out sets

which contain themselves (directly or indirectly).