charlock

名词 charlock:

1. weedy Eurasian plant often a pest in grain fields
   同义词：field mustard, wild mustard, chadlock, Brassica kaber, Sinapis arvensis

char.lock

n.（名词）
An annual weed(Sinapis arvensis) in the mustard family, native to Eurasia and naturalized in North America, having racemes of yellow flowers and hairy stems and foliage.
田芥菜：十字花科中一种一年生的植物（田野白芥属） ，原生长于欧亚大陆，后被移植到北美洲，有开黄花的总状花序和带绒毛的茎和叶

来源：
Middle English cherlok
中古英语 cherlok
from Old English cerlic
源自 古英语 cerlic