The outer seed coat, typically hardened and protective, surrounding the seed.

The protective outer layer of a seed, usually made of hardened cells to prevent damage and desiccation.

A prefix used to denote a group of four, such as in tetrad (a group of four) or tetrapod (four-footed).

A prefix denoting the number four, commonly used in botanical and biological terms.

A scientific name in which the genus and species are the same, used in some plant and animal classifications.

A group of one or more populations of organisms that are classified as a unit, such as a species, genus,…

Different names that refer to the same taxonomic group, used when species or other groups are reclassified or renamed.

The science of classifying organisms into groups based on similarities and differences, including the naming of species.

The inner layer of a seed’s integument, which surrounds and protects the embryo.

A conical tent traditionally used by Native American tribes, often made of animal skins or fabric.