having the shape of an eggthe Oval Office in the White House
the Oval Office in the White House
elliptical(or elliptic), ovate, ovoid(also ovoidal)
in 1561
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。