WordReference Random House Unabridged Dictionary of American English © 2026
mo•sa•i•cism
(mō zā′ə siz′əm),USA pronunciation n. [Biol.]
- Developmental Biologya condition in which an organism or part is composed of two or more genetically distinct tissues owing to experimental manipulation or to faulty distribution of genetic material during mitosis.
- mosaic + -ism 1925–30
'mosaicism' also found in these entries (note: many are not synonyms or translations):