unpatterned 

英汉解释

adj. 无图案装饰的；未成形的，未形成模式的

同义词

a. plain

反义词

a.   patterned

参考例句

1. There had been much controversy concerning the genetics of unpatterned tabbies in the American Shorthair (ASH) breed.
很早就有关于美短无图案虎斑基因的争论。

英英解释

adj.
  1. lacking patterns especially in color