arista /ə-risˈtə/ (biology)

1. A bristly process from the glume of certain grasses, an awn
2. A bristle-like appendage on some insects' antennae

• two-power standard
• two-roomed
• twos
• two-score
• two-scores
• twoseater
• twoseaters
• two shakes
• two shakes of a lamb's tail
• two-sided
• two-sidedness
• twosome
• twosomes
• two-speed gear
• two-start thread
• two-step
• two-steps
• two-storey
• two-storeyed
• two strings to one's bow
• twostroke
• twostrokes
• two ticks
• two-time
• two-timed