noun

• (medicine) Initialism of hormone replacement therapy. [(medicine, especially serotherapy) Any of several medical regimens that introduce sex hormones to the body to replace lost or unavailable ones.]
• (linguistics) Initialism of high rising terminal, a type of speech that rises in pitch at the end (sounding like a question).
• (law enforcement) Initialism of hostage rescue team.
• (quilting) Initialism of half-rectangle triangle.