Used Rarely. gravamen is in the lower 50% of commonly used words in the Collins dictionary
The coconut endosperm is a nuclear type. In very young coconut fruit (about 50mm long) the endosperm is found as a clear fluid in which float numerous nuclei of various sizes. This fluid is compactly filling the embryo sac in which the embryo is developing.
This triploid nucleus turns into an endosperm, which nourishes the developing embryo (filling the role of gametophyte tissue in the gymnosperm seed). As in gymnosperms, the ovule becomes a seed, encasing the embryo and endosperm in a seed coat.