| ̷ ̷(ˌ) ̷ ̷| ̷ ̷ noun
: a stone core shaped like the carapace of a tortoise and constituting the nodule from which prehistoric man flaked off material for tools
| ̷ ̷(ˌ) ̷ ̷| ̷ ̷ noun
: a stone core shaped like the carapace of a tortoise and constituting the nodule from which prehistoric man flaked off material for tools
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012