Headaches associated with marijuana withdrawal can last for a few weeks up to a couple of months. Headaches, like most other symptoms of withdrawing from marijuana use, will usually begin one to three days after quitting and will peak two to six days after stopping.
fertilization - creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant. fecundation, fertilisation, impregnation. conception, creation - the event that occurred at the beginning of something; from its creation the plan was doomed to failure.
Definition of CEPHALIZATION. : a tendency in the evolution of organisms to concentrate the sensory and neural organs in an anterior head.ADVERTISEMENT. noun cephÂ·aÂ·liÂ·zaÂ·tion. : an evolutionary tendency to specialization of the body with concentration of sensory and neural organs in an anterior head.edical Definition of CEPHALIZATION. : an evolutionary tendency to specialization of the body with concentration of sensory and neural organs in an anterior head.