Answer: micropyle

AnswerCrossword Clue
micropyleA small opening in the surface of an ovule, through which the pollen tube penetrates, often visible as a small pore in the ripe seed
micropylea micropore in ovum for spermatozoon; a minute pollen opening in a plant ovule
micropyleA small opening in the egg of a fish, insect, etc., through which spermatozoa can enter