Leukotriene, an inflammatory mediator. The full name "leukotriene" is a newly synthesized bioactive medium in the effective stage of hypersensitivity reaction, and it is a slow-acting substance with similar effect to histamine.

Military title:

"LT" is the abbreviation of captain and captain of the United States army, and the full name is "lieutenant"

Mathematical Proprietary Items of Extended Data:

In mathematics, "LT" means "less than", which is equivalent to a mathematical symbol "