A discontinuity on the surface of a casting appearing as a raised, narrow, linear ridge that forms upon cracking of the sand mold or core due to expansion of the sand during filling of the mold with molten metal. Found on https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/
Thin-walled vessels that carry blood to the heart. Units of the circulatory system that carry blood to the heart. Found on https://www.encyclo.co.uk/local/21571