ALL meanings of helium
he·li·um
H h - noun helium The chemical element of atomic number 2, an inert gas that is the lightest member of the noble gas series. 1
- noun helium liquid helium existing as a superfluid below the lambda point of 2.186 K, having very low viscosity and very high thermal conductivity. 1
- noun helium inert gas 1
- uncountable noun helium Helium is a very light gas that is colourless and has no smell. 0
- noun helium a very light nonflammable colourless odourless element that is an inert gas, occurring in certain natural gases: used in balloons and in cryogenic research. Symbol: He; atomic no: 2; atomic wt: 4.002602; density: 0.1785 kg/m3; at normal pressures it is liquid down to absolute zero; melting pt: below –272.2°C; boiling pt: –268.90°C 0
- noun helium a colorless, odorless chemical element, one of the noble gases, having the lowest known boiling and melting points: it is used in low-temperature work, as a diluent for oxygen, in deep-sea breathing systems, for inflating balloons, etc.: symbol, He; at. no., 2 0
- noun helium (Uncountable Noun) A colorless and inert gas, and the second lightest chemical element (symbol He) with an atomic number of 2 and atomic weight of 4.002602. 0
- noun helium (Countable Noun) A form or sample of the element. 0