TEARTHUMB Meaning of TEARTHUMB in English ˈ ̷ ̷ˌ ̷ ̷ nounEtymology: tear (III) + thumb; from the minute prickles on the stem: any of several plants of the genus Polygonum having prickly stems Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012