1. (of animals that have several estrous cycles in one breeding season) in a period of sexual inactivity
   - diestrous, dioestrous, diestrual

See also: anestrous

• underreckoning
• underrun
• undersaturated
• underscore
• undersea
• underseal
• undersealed
• undersecretary
• undersell
• underseller
• undersexed
• undershirt
• undershoot
• undershorts
• undershot
• undershrub
• underside
• undersign
• undersize
• undersized
• underskirt
• underslung
• undersoil
• underspend
• understaffed