visual communication

名词 visual communication:

1. communication that relies on vision

1. A flexible tuft of feathers located above the eyes of certain birds, such as owls, that functions in visual communication but not in hearing.
   毛簇，羽一些鸟类眼睛上方的一簇能活动的羽毛，如猫头鹰，用于视觉传递而非听觉器官