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

• methodize
• methodized
• methodizer
• methodizers
• mimmest
• mimmick
• mimmicked
• mimmicking
• mimmicks
• mim-mou'd
• mimographer
• mimographers
• mimographies
• mimography
• mimosa
• Mimosaceae
• mimosaceous
• mimosae
• mimosas
• mimsey
• mimsier
• mimsiest
• mimsy
• mimulus
• mimuluses