Definition of "di-" in English

prefix

1. Two.

   • diacetate
   • dialkene
   • diarchy
   • diactinal

2. Double, twice the quantity.

   • diglossia
   • dicatalectic
   • dichoree

3. A pair.

   • diblock
   • dimeson
   • dijet

4. Both, possessing two distinct (possibly opposing) qualities.

   • dikinetic
   • dialetheism
   • dianalytic

prefix

1. Alternative form of dis-: split, to split; shortened before l, m, n, r, s (followed by a consonant), and v; also often shortened before g, and sometimes before j.

   • divide
   • diverge

prefix

1. Alternative form of dia-: across or through, before a vowel.

   • diactinic
   • dielectric