1. Of members of a team; not substitutes 
2. Being a regular member of a team
   "first-string players"

See also: primary, regular

• oxford-gray
• oxford-grey
• Oxfordshire
• oxheart
• oxheart cherry
• oxidant
• oxidase
• oxidate
• oxidation
• oxidation number
• oxidation state
• oxidation-reduction
• oxidation-reduction indicator
• oxidative
• oxidative phosphorylation
• oxide
• oxidisable
• oxidisation
• oxidise
• oxidised
• oxidised LDL cholesterol
• oxidiser
• oxidising agent
• oxidizable
• oxidization