Micropyle
Micropyle , noun
[Micro- + Greek {not transcribed} gate, orifice: compare French micropyle.]
(a)
(Biology) An opening in the membranes surrounding the ovum, by which nutrition is assisted and the entrance of the spermatozoa permitted.
(b)
(Biology) An opening in the outer coat of a seed, through which the fecundating pollen enters the ovule.