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.
Define lignin: an amorphous polymer related to cellulose that provides rigidity and together with cellulose forms the woody cell walls of plants and â¦ an amorphous polymer related to cellulose that provides rigidity and together with cellulose forms the woody cell walls of plants and theâ¦