Meaning of PEAR HAWTHORN

WordNet Dictionary
	Definition:		[n]  erect and almost thornless American hawthorn with somewhat pear-shaped berries
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	Synonyms:		blackthorn, Crataegus calpodendron, Crataegus tomentosa, pear haw
	See Also:		Crataegus, genus Crataegus, haw, hawthorn