The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
para1
VARIANT FORMS:
or par
PREFIX:
1. Beside; near; alongside: parathyroid.2. Beyond: paranormal.3. Incorrect; abnormal: paresthesia.4. Similar to; resembling: paratyphoid fever.5. Subsidiary; assistant: paraprofessional.6. Isomeric; polymeric: paraldehyde.7. A diatomic molecule in which the nuclei have opposite spin directions: parahydrogen.8. Of or relating to one of three possible isomers of a benzene ring with two attached chemical groups in which the carbon atoms with attached groups are separated by two unsubstituted carbon atoms: para-aminobenzoic acid.