So I was thinking, and decided to go check out the Pokedex entries for Pinsir, and it itself calls them horns and pincers. Case in point -
Sapphire - PINSIR has a pair of massive horns. Protruding from the surface of these horns are thorns. These thorns are driven deeply into the foe’s body when the pincer closes, making it tough for the foe to escape.
Heart Gold - With its pincer horns, it digs burrows to sleep in at night. In the morning, damp soil clings to its body.
Moon - One solid blow from its horns is enough to split apart a large tree. Its greatest rival in Alola is Vikavolt.
Sun - It grips its prey in its pincers and splits them apart. Although it is a powerful Pokémon, it can’t deal with the cold.
Let's be honest, Game Freak doesn't even know what they are.
Sapphire - PINSIR has a pair of massive horns. Protruding from the surface of these horns are thorns. These thorns are driven deeply into the foe’s body when the pincer closes, making it tough for the foe to escape.
Heart Gold - With its pincer horns, it digs burrows to sleep in at night. In the morning, damp soil clings to its body.
Moon - One solid blow from its horns is enough to split apart a large tree. Its greatest rival in Alola is Vikavolt.
Sun - It grips its prey in its pincers and splits them apart. Although it is a powerful Pokémon, it can’t deal with the cold.
Let's be honest, Game Freak doesn't even know what they are.