Define vertebrate: any of a subphylum (Vertebrata) of chordates that comprises animals (such as mammals, birds, reptiles, â¦ â vertebrate in a sentence any of a subphylum (Vertebrata) of chordates that comprises animals (such as mammals, birds, reptiles, amphibians, and fishes) typically having aâ¦ See the full definition
Definition of LIGNITE. : a usually brownish black coal intermediate between peat and bituminous coal; especially: one in which the texture of the original wood is distinct âcalled also brown coal.
For themost part, the higher ranks of coal contain more heat-producing energy. Lignite is the lowest rank of coal with the lowest energy content. Lignite coal depositstend to be relatively young coal deposits that were not subjected to extreme heat orpressure.Lignite is crumbly and has high moisture content.ignite is the lowest rank of coal with the lowest energy content. Lignite coal depositstend to be relatively young coal deposits that were not subjected to extreme heat orpressure. Lignite is crumbly and has high moisture content.