micropyle
/ˈmaɪkrəʊpaɪl/noun
1- Botany a small opening in the surface of an ovule, through which the pollen tube penetrates, often visible as a small pore in the ripe seed【植】珠孔。
1.1
- a small opening in the egg of a fish, insect, etc., through which spermatozoa can enter卵孔。
词源
early 19th cent.: from MICRO- 'small' + Greek pulē 'gate'.