1. Any of several lichens of the genus Parmelia from which reddish brown or purple dyes are made
   - crottle, crotal

Derived forms: crottals

Type of: lichen

Part of: genus Parmelia, Parmelia

• thrip
• thripid
• Thripidae
• thrips
• Thrips tobaci
• thrive
• thriving
• thro'
• throat
• throat infection
• throat protector
• throat sweetbread
• throated
• throatily
• throatiness
• throatwort
• throaty
• throb
• throbbing
• throe
• throes
• thrombasthenia
• thrombectomy
• thrombin
• thrombocyte