1. A form of daylight-saving time, one hour ahead of UTC, used in the United Kingdom, Ireland and mainland Portugal in summer
   - British Summer Time, Irish Standard Time, Western European Summer Time

Encyclopedia: BST

• oocyte
• oodles
• oogenesis
• ooh
• oolite
• oology
• oolong
• Oom Paul Kruger
• oomph
• Oomycetes
• oooh
• oophorectomy
• oophoritis
• oophorosalpingectomy
• oops
• oops-a-daisy
• Oort
• Oort cloud
• oosphere
• oospore
• ootid
• ooze
• ooze leather
• ooze out
• ooze through