Bible Dictionaries
Scoria

Webster's Dictionary

(1):

(n.) The recrement of metals in fusion, or the slag rejected after the reduction of metallic ores; dross.

(2):

(n.) Cellular slaggy lava; volcanic cinders.

Bibliography Information
Webster, Noah. Entry for 'Scoria'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​s/scoria.html. 1828.