One of the mysteries of the English language finally explained.
1Geology. A structure in which an appearance of stratification has been produced by a process other than sedimentary deposition, e.g. in an igneous rock as a result of parallel fractures.
2Histology. The apparent formation of layers in a single layer of epithelial cells caused by irregular distribution of the nuclei relative to one another.
Mid 19th century; earliest use found in Spencer Baird (1823–1887), zoologist and scientific administrator. From pseudo- + stratification.
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