GUANIDINO Meaning of GUANIDINO in English |gwänə|dē(ˌ)nō adjectivealso gua·ni·do ˈgwänəˌdōEtymology: guanidino-, guanido- : relating to or containing the group H 2 NC( . NH)NH− of guanidine Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012