an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system | (thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work |
an abstract part of something | the 19th letter of the Roman alphabet |
the most favorable environment for a plant or animal | a unit of conductance equal to the reciprocal of an ohm |
a straight line that generates a cylinder or cone | the cardinal compass point that is at 180 degrees |
the situation in which you are happiest and most effective | an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions) |
any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter | |
one of four substances thought in ancient and medieval cosmology to constitute the physical universe | |