senescence

n [U] (fml or medical 文或医) process of becoming old 衰老的过程.

semolina, sempstress, SEN, senate, senator, senatorial, send, send away for, send for, send for sb., send in, send off, send out, send round, send sb. doing sth., send sb. to school, send up, send-off, send-up, sender, senescent, senile, senile dementia, senility, senior, senior citizen, senior high school, seniority, senna, senor, senora, senorita, sensation, sensational, sensationalism, sensationalist, sensationalize, sensationalise, sensationally, sense, sense-organ,