pitch coal
noun
A dense black variety of lignite with a conchoidal fracture.
Origin
Mid 18th century.
- obstetrically
- obstetrical toad
- obstetrician
- obstetrics
- obstinacy
- obstinance
- obstinancy
- obstinate
- obstinately
- obstinateness
- obstination
- obstipation
- obstreperous
- obstreperously
- obstreperousness
- obstruct
- obstructedly
- obstructer
- obstruction
- obstructionary
- obstructionism
- obstructionist
- obstruction light
- obstructive
- obstructive jaundice