skiing in which skiers are transported by helicopter to remote slopes
[hee-lee-uh m] /ˈhi li əm/ noun 1. an inert, gaseous element present in the sun’s atmosphere and in natural gas, and also occurring as a radioactive decomposition product, used as a substitute for flammable gases in dirigible balloons. Symbol: He; atomic weight: 4.0026; atomic number: 2; density: 0.1785 g/l at 0°C and 760 mm pressure. […]
[hel-uh-stop, hee-luh-] /ˈhɛl əˌstɒp, ˈhi lə-/ noun 1. a heliport.
- Helium flash
noun 1. (astronomy) the explosive burning of helium in the case of a star of low mass that occurs when the core is so dense that the matter has become degenerate. The burning causes a rapid rise in temperature until it is so high that the gas ceases to be degenerate, after which there is […]
- Helium hands
noun phrase A student who frequently volunteers in class: There’s a nickname for people like that, ”helium hands,” their hands are always in the air (1990s+)