W: (n) consultation [Related to: consult] (a conference between two or more people to consider a particular question) "frequent consultations with his lawyer"; "a consultation of several medical specialists"
W: (n) consultation [Related to: consult] (the act of referring or consulting) "reference to an encyclopedia produced the answer"
W: (n) reference [Related to: refer] (a publication (or a passage from a publication) that is referred to) "he carried an armful of references back to his desk"; "he spent hours looking for the source of that quotation"
W: (n) reference [Related to: refer] (a book to which you can refer for authoritative facts) "he contributed articles to the basic reference work on that topic"