Detective inspector 3. donor insemination collins english dictionary. ( 1) word- forming element cacace of greek origin meaning " two, double, twice, twofold, " from greek di-, shortened form of istituzioni dis " twice, " which is related to duo " two" and cognate with bi-, from pie chimica root * dwo- " two. " in chemistry it indicates a compound containing two units of the element or radical to which it is prefixed. defence intelligence 2. the form di is used after verb forms ending with a vowel ( namely the simple future tense), while ti is istituzioni di chimica cacace pdf used after other verb forms pdf which end in - t. di is also the form used as an emphatic pronoun after dy ( “ your” ) in possessive and infinitive contexts. di in british english abbreviation for 1. copyright © harpercollins.