| endosperm | Tissue present in the seeds of angiosperms, external to and surrounding the embryo, that it provides with nourishment in the form of starch or other food reserves. Formed by the division of the endosperm mother cell after fertilization, may be absorbed by the embryo prior to seed maturation or may persist in the mature seed. (18 Nov 1997) |
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| endosperm mother cell | Cell of the higher plant embryo sac. Contains two polar nuclei and fuses with the sperm cell from the pollen grain. Gives rise to the endosperm. (18 Nov 1997) |
| endospermic | <botany> Relating to, accompanied by, or containing, endosperm. Source: Websters Dictionary (01 Mar 1998) |