New York State Roads - I-87 Exit List. Interstate 87 is a major north-south road in New York state, connecting New York City, Albany, the Adirondacks, and MontrÃ©al. Like Interstate 90, it runs along the Thruway for part of its length and has three sets of exit numbers.
B2 [ C or U ] a substance in a form like air that is neither solid nor liquid: Oxygen, hydrogen, and nitrogen are all gases. poisonous/inflammable/toxic gas. A2 [ C or U ] a substance in a form like air that is used as a fuel for heating and cooking:
Helium (n.). An inert, monoatomic, gaseous element occurring in the atmosphere of the sun and stars, and in small quantities in the earth's atmosphere, in several minerals and in certain mineral waters.It is obtained from natural gas in industrial quantities. Symbol, He; atomic number 2; at. wt., 4.0026 (C=12.011).iktionary (3.00 / 1 vote) Rate this definition: helium (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. helium (Noun).