neoplasia (n.), neoplasm (n.)

https://doi.org/10.1351/goldbook.15913
New and abnormal formation of tissue as a tumor or growth by cell proliferation that is faster than normal and continues after the initial stimulus that initiated the proliferation has ceased.
Source:
PAC, 2007, 79, 1153. (Glossary of terms used in toxicology, 2nd edition (IUPAC Recommendations 2007)) on page 1269 [Terms] [Paper]