ˌpəŋ(k)ˈtilēəs adjective
Etymology: punctilio + -ous
: attentive to punctilios : marked by precise exact accordance with the details of codes or conventions
fussy about the punctilious observance of orders — Willa Cather
uncivilized people often pay punctilious attention to rules of etiquette about salutations, visits, meetings — W.G.Sumner
Synonyms: see careful