One of several parallel horizontal layers of material arranged one on top of another. / (geology) A layer of sedimentary rock having approximately the same composition throughout.

plural of stratum

(mycology) The area of divergent hyphae which is on either side of the central zone (mediostratum).

(anatomy) The outer layer of the epidermis, composed of dead cells that continually flake away.

A layer of the epidermis found between the stratum granulosum and stratum basale.

(anatomy) A thin layer of cells in the epidermis.

Synonym of stratum basale