Medical Dictionary

stratum spinosum

noun stratum spi·no·sum \-spi-ˈnō-səm\
plural strata spi·no·sa \-sə\

Medical Definition of STRATUM SPINOSUM

:  the layers of prickle cells over the layer of the stratum basale capable of undergoing mitosis—called also prickle cell layer; see malpighian layer

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