TGI

TGI is an initialism that can refer to multiple subjects depending on the context. The most visible use is in the brand TGI Fridays, an American casual dining restaurant chain known for its informal atmosphere, American fare, and international locations. The brand name is derived from the phrase Thank God It's Friday, and branding has varied over time with different punctuation and styling.

In biology and medicine, TGI stands for Tumor Growth Inhibition, a measure used in cancer research to quantify how effectively a treatment suppresses tumor growth. In preclinical studies and early clinical data, TGI is often expressed as a percentage of growth inhibition relative to a control group at a specified time point, and it helps compare the activity of different drugs or regimens.

Because initialisms like TGI can be used by different organizations or concepts, there is no single universal definition. The intended meaning is determined entirely by the surrounding text and domain.