nonvisual

1. Widgets can be both visual ( in that they render visual content, such as a chart) or nonvisual ( in that they provide some form of discrete function or access to a service).
   小部件可以为可视的（呈现可视内容，如图标）或非可视的（提供某种形式的功能或对服务的访问）。
2. Nonvisual sensor and its signal processing method for a mobile robot
   移动机器人非视觉传感器及其信号处理方法
3. Construct reusable class and nonvisual class
   可重用类与非可视类的构建

adj

1. not resulting in vision
   1. nonvisual stimuli