conferva /kon-fûrˈvə/

1. Any freshwater alga of the genus Conferva (class Heterocontae) forming slimy masses or tufts of unbranched filaments
2. Loosely applied to any filamentous freshwater alga

• rarefaction
• rarefactions
• rarefactive
• rarefiable
• rarefied
• rarefies
• rarefy
• rarefying
• rare gas
• rare groove
• rarely
• rareness
• rarenesses
• rarer
• rare-ripe
• rarest
• raring
• rarities
• rarity
• ras
• RAS
• rasae
• rascaille
• rascailles
• rascal