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