The use of chemical as synonymous with toxic, hazardous or poison in some contexts, particularly popular media, is common. 4 This gives rise to a definition of chemical as something synthetic and toxic, and leads to a series of misconceptions such as the possibility of leading a chemical-free life.
Breeding of different branches of the equine family, which does not occur in the wild, generally results in infertile offspring. The combination of sire and dam also affects the offspring phenotype. A zorse is the offspring of a zebra stallion and a horse mare. This cross is also called a zebrula, zebrule, or zebra mule. The rarer reverse pairing is sometimes called a horbra, hebra, zebrinny or zebret. Like most other animal hybrids, the zorse is sterile.
Medical Definition of DERMACENTOR. : a large widely distributed genus of ornate ticks of the family Ixodidae including a number that attack humans and other mammals and several that are vectors of important diseases (as Rocky Mountain spotted fever). a large widely distributed genus of ornate ticks of the family Ixodidae including a number that attack humans and other mammals and several that are vectors of important diseases (as Rocky Mountain spotted fever).