1. Coal suitable for use under steam boilers

Derived forms: steam coals

Type of: coal

• Third Reich
• third sacker
• third stomach
• third tonsil
• third trimester
• third ventricle
• Third World
• third-class mail
• third-degree burn
• third-dimensional
• third-dimensionality
• third-place finish
• third-rate
• third-rater
• third-year
• thirdhand
• thirdly
• thirst
• thirst for knowledge
• thirster
• thirstily
• thirstiness
• thirsty
• thirteen
• thirteenth