• (n.) A genus of spiders, including the common garden spider (E. diadema). They spin geometrical webs. See Garden spider.
E·pei'ra noun [ New Latin ] (Zoology) A genus of spiders, including the common garden spider ( E. diadema ). They spin geometrical webs. See Garden spider . 
Epeira is a genus of spiders, comprising the largest and best-known British species. Epeira diadema, the common Garden Spider, which is a handsomely marked species.