n. pl. locÂ·ules or locÂ·uÂ·li (-lÄ«â²). A small cavity or compartment within an organ or part of an animal or plant, as any of the cavities within a plant ovary. [Latin.
Competitive inhibition is a form of enzyme inhibition where binding of the inhibitor to the active site on the enzyme prevents binding of the substrate and vice versa. Most competitive inhibitors function by binding reversibly to the active site of the enzyme.
Freebase (0.00 / 0 votes) Rate this definition: Selective serotonin reuptake inhibitor. Selective serotonin re-uptake inhibitors or serotonin-specific reuptake inhibitor are a class of compounds typically used as antidepressants in the treatment of depression, anxiety disorders, and some personality disorders.elective serotonin reuptake inhibitor (Noun). Any of a class of drugs, such as fluoxetine or sertraline, that inhibit the uptake of serotonin in the central nervous system and are often used to treat certain mental illnesses, such as depression.