noun
: a small shallow depression formed by the impact of a raindrop in fine sand, mud, or clay and sometimes preserved on the bedding planes of sedimentary rocks
noun
: a small shallow depression formed by the impact of a raindrop in fine sand, mud, or clay and sometimes preserved on the bedding planes of sedimentary rocks
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012