di

Di or DI may refer to:

• Di (surname) (狄), a Chinese surname sometimes also romanized Dee, particularly:
  • Di Renjie a Tang-dynasty official later fictionalized in a series of Chinese detective stories
• A diminutive form of the names:
  • Diana (given name)
  • Diane
  • Dianne (disambiguation)
• Princess Di, a common name for Diana, Princess of Wales (1961–1997)

Di (Chinese: , p Dì, w Ti, lit. "earth") is one of the oldest Chinese terms for the earth and a key concept or figure in Chinese mythology and religion. In Taoism and Confucianism, Di is often translated as "Earth" and is mentioned in relationship to its complementary aspect of Tian, most often translated as "Heaven".

Di people may refer to:

• Di (狄), also called Beidi (北狄) or Northern Di: Zhou Dynasty ethnic groups living in northern China
• Di (Five Barbarians) (氐): one of the Five Barbarians of the Sixteen Kingdoms period.

Numeral or number prefixes are prefixes derived from numerals or occasionally other numbers. In English and other European languages, they are used to coin numerous series of words, such as unicycle – bicycle – tricycle, dyad – triad – decade, biped – quadruped, September – October – November – December, decimal – hexadecimal, sexagenarian – octogenarian, centipede – millipede, etc. There are two principal systems, taken from Latin and Greek, each with several subsystems; in addition, Sanskrit occupies a marginal position. There is also an international set of metric prefixes, which are used in the metric system, and which for the most part are either distorted from the forms below or not based on actual number words.