Stone harpoon

…A small stone tool used as the tip of an arrow. Usually, for convenience, those that are less than 5 cm long and weigh up to 5 g are called stone arrowheads, and those that are larger than that are called stone harpoons or stone spears. They have been excavated from Neolithic and later ruins around the world. …

*Some of the terminology explanations that mention "stone harpoon" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…矢のさきに用いる小型の石器。通常便宜的に，長さが5cm以下で重さが5gまでのものを石鏃と呼び，それ以上のものを石銛，石槍と呼びわけている。世界中の新石器時代以降の遺跡から出土する。…

※「石銛」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報