contextually | optional

optional abbr.
chem.	à volonté; facultativement
comp.	aux choix; au choix
comp., MS	facultatif
IT	optionnel
law	facultatif

| token

token abbr.
gen.	jeton d'authentification
comp., MS	jeton
fin. IT	jeton
IT	symbole
ling.	accident; instance; occurrence; signe-occurrence; token
transp.	gage