nucellus

noun, plural nu·cel·li [noo-sel-ahy, nyoo-] /nuˈsɛl aɪ, nyu-/. Botany.

1. the central cellular mass of the body of the ovule, containing the embryo sac.

noun plural -li (-laɪ)

1. the central part of a plant ovule containing the embryo sac

Plural nucelli (nōō-sĕl′ī)

1. The megasporangium of a seed-bearing plant, located in the ovule. In angiosperms, it is the central portion of the ovule in which the embryo sac develops. In some cases of apomixis (production of seeds without fertilization), cells of the nucellus develop into an embryo.