phi /fī or fē/

1. The twenty-first letter (Φ, φ) of the Greek alphabet, orig as aspirated p (as in upheave), now pronounced as f and transliterated ph
2. As a Greek numeral φˈ = 500, ˌφ = 500000

PHI

Permanent health insurance

• perked
• perkier
• perkiest
• perkily
• perkin
• perkiness
• perkinesses
• perking
• perkins
• perks
• perk up
• perky
• PERL
• Perl
• perlite
• perlites
• perlitic
• perlocution
• perlocutionary
• perlocutions
• perlous
• perlustrate
• perlustrated
• perlustrates
• perlustrating