Where can I get a list of SI prefixes and their origins?
For a complete list of the SI prefix names and symbols, with their factors, pronunciations, and origins, see SI prefixes and their etymologies. SI prefixes are defined for powers of 1000 — i.e., 10n where n is a multiple of 3 — as well as 10±1 and 10±2. Long ago, there was a prefix for a factor of 10 000 (104), “myria,” but that is long obsolete and not used in SI. You’ll see it (and a few other obsolete units) listed in the original tables in the Metric Act of 1866. References: SI Brochure §3.1, table 5 • ISO 31-0 §2.3.2.3, table 4 • IEEE/ASTM SI-10 §2.2, Table 5 • NIST SP 811 §4.4, table 5.
