Botany. A round and flattened part in a plant. A disc-shaped marking or bordered pit in the wood cells of certain trees, esp. gymnosperms. Cf. discig…

Botany. A protoplasmic object resembling a crystal as seen in certain plant cells; esp. an insoluble angular proteinaceous inclusion within an…

Botany. A chloroplast.

Botany. An organelle in the cytoplasm of a plant cell bound by a double membrane and usually containing pigment or food substances, e.g. a…

Any of the discs which are arranged in stacks in the chloroplast, which are formed of membranes and in which the chlorophyll is incorporated.

the triploid nucleus which results from the fusion of the two polar nuclei of the embryo sac with a sperm nucleus, and which (usually) divides to…

A chromatophore that contains pigments other than chlorophyll, esp. one that contains no chlorophyll. Also attributive.

A set of microtubules which forms during mitosis in some plant cells, appearing as a barrel-shaped structure linking the two sets of chromosomes…

A narrow thread of cytoplasm that passes between adjacent cells and allows communication between them.

A layer of darker cytoplasm which forms during mitosis in some plant cells at the site of the future cell plate. Also: any of the large number of…