optical disk 或 optical disc

optical-disk的词性：
n.Computer Science （名词）【计算机科学】

1. A plastic-coated disk that stores digital data, such as music or text, as tiny pits etched into the surface and is read with a laser scanning the surface.Also called laser disk
光盘：用于存储数字数据（如音乐、文字）的包有塑料的盘片，如附于表面的小凹槽，可以通过激光浏览表面读出信息也作 laser disk