nitr-

WordReference Random House Unabridged Dictionary of American English © 2026

nitr-, 

1. var. of nitro- before a vowel:
   nitramine.

WordReference Random House Unabridged Dictionary of American English © 2026

ni•tro  (nī′trō), adj. 

1. [Chem.] containing the nitro group.

n. 

2. nitroglycerin.

• see nitro- 1855–60

nitro-, 

1. a combining form used in the names of chemical compounds in which the nitro group is present:
   nitroglycerin.

Also,[esp. before a vowel,] nitr-. 

• combining form of Greek nítron. See niter