Hydrocarbon, any of a class of organic chemical compounds composed only of the elements carbon (C) and hydrogen (H). The carbon atoms join together to form the framework of the compound; the hydrogen atoms attach to them in many different configurations. Hydrocarbons are the principal constituents of petroleum and natural gas.
Use slab in a sentence. 1  a piece that is flat, broad, and fairly thick: a slab of concrete, a slab of bread.  any of the rough, outer pieces cut from a log, as in sawing it into lumber.
[stee-leez, steelz] /Ësti liz, stilz/ (Show IPA) 1. an upright stone slab or pillar bearing an inscription or design and serving as a monument, marker, or the like. 2. Architecture. a prepared surface on the face of a building, a rock, etc., bearing an inscription or the like. 3. (in ancient Rome) a burial stone.