upsilon /ūp-sīˈlon, ŭp-, ūpˈsi- or upˈsi-/ or ypsilon /ip-sīˈlon or ipˈsi-/

1. The twentieth letter of the Greek alphabet (Υ, υ)
2. As a numeral υˈ = 400, ˌυ = 400000
3. A short-lived heavy subatomic particle produced when beryllium nuclei are bombarded with high-energy protons

• BPharm
• BPhil
• bpi
• b.pl.
• bpm
• BPM
• bps
• BPS
• Bq
• B quadratum
• br
• br.
• BR
• Br
• Br.
• bra
• braai
• braais
• braaivleis
• braaivleises
• brabble
• brabbled
• brabblement
• brabblements
• brabbles