ylem
/ˈiːləm/noun
mass noun
- Astronomy (in the big bang theory) the primordial matter of the universe, originally conceived as composed of neutrons at high temperature and density【天文】伊伦, 原元素（大爆炸理论中提出的, 存在于宇宙中的一种原初物质, 据认为是由高温、高密度状态下的中子构成）。
词源
1940s: from late Latin hylem (accusative) 'matter'.