micropyle
Kelime Anlamı :
1. Spermatozoidin yumurtaya girdiği delik, mikropil.
Tanımlar :
1.
botany A minute opening in the ovule of a seed plant through which the pollen tube usually enters.
2. zoology A pore in the membrane covering the ovum of some animals through which a spermatozoon can enter.
2. zoology A pore in the membrane covering the ovum of some animals through which a spermatozoon can enter.
from The American Heritage® Dictionary of the English Language, 4th Edition
1.
in seed-bearing plants, a small opening in the integuments of the ovule through which sperm are able to access the ovum.
from Wiktionary, Creative Commons Attribution/Share-Alike License
1.
an opening in the membranes surrounding the ovum, by which nutrition is assisted and the entrance of the spermatozoa permitted.
2. an opening in the outer coat of a seed, through which the fecundating pollen enters the ovule.
2. an opening in the outer coat of a seed, through which the fecundating pollen enters the ovule.
from the GNU version of the Collaborative International Dictionary of English
1.
in botany, the orifice or canal in the coats of the ovule leading to the apex of the nucleus, through which the pollen-tube penetrates.
2. in zoology: the scar or hilum of an ovum at the point of its attachment to the ovary
3. any opening in the coverings of an ovum through which spermatozoa may gain access to the interior, or a cluster of minute pores on the surface of an egg through which fertilization is effected. on the eggs of lepidopterous insects these pores often form a rosette at one end.
4. in zoology: in certain sporozoans, a minute opening in the oöcyst through which the microgamete enters to fertilize the macrogamete.
2. in zoology: the scar or hilum of an ovum at the point of its attachment to the ovary
3. any opening in the coverings of an ovum through which spermatozoa may gain access to the interior, or a cluster of minute pores on the surface of an egg through which fertilization is effected. on the eggs of lepidopterous insects these pores often form a rosette at one end.
4. in zoology: in certain sporozoans, a minute opening in the oöcyst through which the microgamete enters to fertilize the macrogamete.
from The Century Dictionary and Cyclopedia