plural of 10-20

The presence of three copies of the 21st chromosome in the karyotype.

(postpositive) A second major version of something or, figuratively, of someone; a substantial improvement.

The decade from 2010 to 2019.

The decade from 2020 to 2029.

(humorous) A phrase indicating that something must be done directly without delays or deviations.

A phrase telling someone to pursue a path directly without deviations.

(code word, euphemistic) Casualties for transportation in the Soviet and modern Russian military. In official use, cargo 200 refers to bodies contained in zinc-lined coffins, but in a military context it may be used for dead bodies as they are transported from the battlefield.

(computing) An issue for computing and data storage situations in which time values are stored or calculated as a signed 32-bit integer, and this number is interpreted as the number of seconds since 00:00:00 UTC on 1 January 1970. Such implementations cannot encode times after 03:14:07 UTC on 19 January 2038

Abbreviation of twenty-twenty.