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Hecto or hecta is a decimal unit prefix in the metric system denoting a factor of one hundred.It was adopted as a multiplier in 1795, and comes from the Greek á¼ÎºÎ±ÏÏÎ½ hekaton, meaning hundred.Based on a proposal by Thomas Young, the prefix was often alternatively spelled hecato-in early 19th century sources. Its unit symbol as an SI prefix in the International System of Units (SI) is the lower case letter h.t was adopted as a multiplier in 1795, and comes from the Greek á¼ÎºÎ±ÏÏÎ½ hekaton, meaning hundred. Based on a proposal by Thomas Young, the prefix was often alternatively spelled hecato-in early 19th century sources.
Browse prefixes >>. haem- or haema- or haemo- See: hem-. haemat- or haemato- See: hem-. hallucin- or hallucino- [Latin allucinari to prate, to dream] Denotes false perception (hallucinogen). hapl- or haplo- (also apl- or aplo-) [Greek haploeides single] (1) single, simple (haploid); (2) denoting the haploid condition (haplotype).