1. Off work, but available to provide a service if requested
   "I'm on call for my patients 4 days a week and every fourth weekend"

Encyclopedia: On call

• thieve
• thievery
• thieving
• thievish
• thievishly
• thievishness
• thigh
• thigh boot
• thigh pad
• thigh-slapper
• thighbone
• thigmotaxis
• thill
• thimble
• thimble-shaped
• thimbleberry
• thimbleful
• thimblerig
• thimblerigger
• thimbleweed
• thimerosal
• thin
• thin air
• thin out
• thin person