Word: burrstones
Part of speech: Noun
Syllables: burr
stones
Definition: Plural of burrstone; <!-- 
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Morphemes:
Affix: burrstone
Language: en
PoS: Noun
Meaning: A tough, silicified limestone formerly used to make millstones. It is typified by the presence of multiple cavities that originally housed fossilized shells.
Affix: -s
Language: en
PoS: Suffix
Meaning: Used to form many pluralia tantum (nouns that are almost or entirely without singular forms).