光锥

Traditional form:

光錐

Pinyin (reading):

guāngzhuī

Definitions:

• (physics) light cone

Characters:

• 光 - light; bright, brilliant; only, merely
• 锥 - gimlet, drill, awl; to drill, to bore

Traditional characters:

• 光 - light; bright, brilliant; only, merely
• 錐 - gimlet, drill, awl; to drill, to bore