How do you say second hand in french?

Answer 1

As an adjective meaning "used", you say "d'occasion" or "usagé(e)(s)" (fem.) (plur.).

When it is applied to smoking, the translation is "passif" (passive in fem.)

The noun for the second-hand on the watch or the clock is "la trotteuse" or "l'aiguille des secondes".