From Longman Dictionary of Contemporary Englishdeci-deci- /desɪ/ prefix [in nouns] XXa 10th part of a unit a decilitre (=0.1 litres) → deca-
Examples from the Corpus
deci-• a deciliterFrom Longman Business Dictionarydeci-de‧ci- /desɪ/ prefix used in the metric system to mean ‘one tenth’. For example, a decimetre is equal to one tenth of a metreOrigin deci- French déci-, from Latin decimus “tenth”, from decem “ten” 