met n. cancer that has spread beyond its point of origin. Editorial Note: The plural form, mets, is sometimes used in the singular, perhaps because of a mistaken reinterpretation of mets as a clipping of the singular metastasis. Etymological Note: Clipping of metastasis ‘a change in a location (in a body) of a disease; a disease that has made such a change’ or metastases, the plural form. (source: Double-Tongued Dictionary)
Further reading
The owner of a Berlin, Maryland, produce stand wants to know: When a customer is buying four ears of corn, should they say I have four corn or I have four ears of corn? Corn is a mass noun that can also be counted as a plural, just as we might say I...
We use the term Milky Way for that glowing arc across the sky. But how people picture it varies from culture to culture. In Sweden, that starry band goes by a name that means “Winter Street,” and in Hawaii, a term for the Milky Way...