Definition & Meaning of "HL"

Usage of HL

Half-Life (HL) is a term used in physics and chemistry to describe the time it takes for a substance to decay or for half of a given quantity of radioactive atoms to decay. In video games, Half-Life is a first-person shooter game developed by Valve Corporation that was first released in 1998. It was an incredibly popular game that spawned sequels and spin-off games.

Examples of HL used in texting:

1. Hey, have you played HL before? It's one of my favorite games. (Example of HL used in gaming discussion)
2. The HL of carbon-14 is 5,700 years, did you know that? (Example of HL used in scientific discussion)
3. I just completed the HL campaign on hard mode, it was so intense! (Example of HL used in gaming discussion)