Stage of mitosis or meiosis in which the chromosomes become aligned on the equatorial plate of the cell, separating the centromeres.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 779 (https://doi.org/10.1515/pac-2015-1202)