Word: alumstone
Part of speech: Noun
Syllables: al
um
stone
Definition: alunite. A gray, water-soluble mineral, potassium aluminium sulphate; the natural source of alum, K Al3( S O4)2(O H)6.
Morphemes:
Affix: alum
Language: en
PoS: Noun
Meaning: An astringent salt, usually occurring in the form of pale crystals, much used in the dyeing and tanning trade and in certain medicines, and now understood to be a double sulphate of potassium and aluminium (K2SO4·Al2(SO4)3·24H2O).
Affix: stone
Language: en
PoS: Noun
Meaning: A hard earthen substance that can form large rocks.