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nucellus
This term is a specialized botanical descriptor used almost exclusively in plant anatomy and embryology. It describes the nutrient-rich tissue that protects the embryo sac, acting as a biological support system during the early stages of seed development.
Because it refers to a specific anatomical structure within a seed plant, it is used in a technical, scientific register. It is rarely encountered outside of academic textbooks, botanical research, or professional horticultural studies.
Meanings
Examples
The nucellus provides essential nutrients to the developing embryo sac.
Look closely at the slide to see where the nucellus meets the integuments.
I wonder if the nucellus in this species persists after fertilization.
The pollen tube must penetrate the nucellus to reach the egg cell.
In some plants the nucellus is completely consumed by the growing embryo sac.
The nucellus consists of a mass of parenchymatous tissue.
Is the nucellus considered part of the sporophyte generation?
Is the nucellus considered part of the sporophyte generation?
The thickness of the nucellus varies significantly across different angiosperm families.
The thickness of the nucellus varies significantly across different angiosperm families.
The nucellus acts as a protective layer for the female gametophyte.
The nucellus acts as a protective layer for the female gametophyte.