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Deca-
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Look up <i>deca-</i> in Wiktionary, the free dictionary. Look up <i>deca-</i>, <i>deka-</i>, or <i>dec-</i> in Wiktionary, the free dictionary. <p>Deca (and dec), sometimes deka, is a common <a href="/facts/English_language/tpkxGt7b">English-language</a> <a href="/facts/Numeral_prefix/b5sechhR">numeral prefix</a> derived from the <a href="/facts/Late_Latin/Ju8RH1es">Late Latin</a> <i>decas</i> ("(set of) ten"), from <a href="/facts/Ancient_Greek/LIK7NlUh">Ancient Greek</a> δεκάς (dekás), from δέκα (déka, "<a href="/facts/10_(number)/pqN3l0vm">ten</a>"). It is used in many words. </p><p>It is also a <a href="/facts/Decimal_prefix/Y2MzkaeL">decimal</a> <a href="/facts/Unit_prefix/CTotM82r">unit prefix</a> in the <a href="/facts/International_System_of_Units/S7YLglNz">International System of Units</a> (SI) denoting a factor of ten, with symbol da and spelled "deca" internationally (or "deka" in <a href="/facts/American_and_British_English_spelling_differences/YEtRtJrV">American spelling</a>). </p>