noun
liquid helium
Technical and scientific term for helium in its liquid state, used in cryogenics and physics.
液体ヘリウムは超伝導磁石の冷却に使われる。
Liquid helium is used to cool superconducting magnets.
ヘリウム is the element helium in general; 液体ヘリウム specifically refers to its liquid form.
Compound of 液体 (liquid) and ヘリウム (helium), a straightforward scientific term.