Definition of "di-" [di-]

• Two; twice; double: dichromatic. (prefix)
• Containing two atoms, radicals, or groups: dichloride. (prefix)
• Variant of dia-. (prefix)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I think pragmatically the politics are such that we would be wise to resist grants and/or contracts directly to ACORN, Inc. but try and either set up separate corporations … or use existing corporations … that are less overtly moving the money di- rectly into ACORN, Inc., though in truth it would be going there in other ways."
• "The aroma of asafoetida is due to a complex mixture of sulfur compounds, a dozen identical with volatiles in the onion family, and a number of less common di-, tri-, and tetrasulfides."