秒速

1. Origins, structure, and basic meaning

• Structure: 秒速 (びょうそく) is a unit noun expressing speed as distance traveled per second.
• Basic usage: 速さを秒速で表示する uses per-second measurement as the display format, while 秒速二メートルで進む supplies a number and distance unit to form a complete speed value.

2. Common pitfalls and similar expressions

• Unit label and complete measurement
  • 秒速 alone does not specify how many meters are traveled. A concrete speed requires a number and distance unit, as in 秒速二メートル; the first example names only the measurement format.