Term: Heavy Armor
Heavy Armor is the Armor made for those who will wade into melee, and/or want to be the most protected. Often, these armors are as heavy as their namesake suggests, while making the wearers sturdy and unmovable.
All all Heavy Armors have a high Armor Class / AC that is set, regardless of other stats aside from Half-Proficiency, as well as giving higher than normal Armor HP. To offset this, most Heavy Armors give disadvantage on Stealth checks by default, and have Strength requirements.
A list of Heavy armor can be found at List: Heavy Armors.