nif1
/nɪf/Genetics
noun
Usually italicized. More fully nif gene. (A symbol for) a gene which encodes nitrogenase or other proteins required for bacterial nitrogen fixation. Frequently with distinguishing following capital, denoting individual genes.
Origin
1970s. Acronym from the initial letters of nitrogen fixation.
nif2
/nɪf/Chiefly English regional (south-western ). Now rare
conjunction
= if.
Origin
Mid 18th century; earliest use found in Exmoor Scolding. Reduced form of an if.
NIF3
Immunology
noun
Neutrophil immobilizing factor, neutrophil inhibitory factor.
Origin
1970s; earliest use found in Journal of Immunology.
NIF4
Pharmacology
noun
Nifedipine.
Origin
1980s; earliest use found in Journal Cardiovascular Pharmacology.