scoriaceous


sco·ri·a

S0156100 (skôr′ē-ə)n. pl. sco·ri·ae (skôr′ē-ē′) 1. Geology Porous cinderlike fragments of dark lava. Also called cinders, slag.2. Metallurgy The refuse of a smelted metal or ore; slag. Also called cinder.
[Middle English, dross, from Latin scōria, from Greek skōriā, from skōr, excrement, dung; see sker- in Indo-European roots.]
sco′ri·a′ceous (-ā′shəs) adj.