ACROSTIC n.
A composition, usually in verse, in which the first or the last letters of the lines, or certain other letters, taken in order, form a name, word, phrase, or motto.
ADVERSATIVE a.
Expressing contrariety, opposition, or antithesis; as, an adversative conjunction (but, however, yet, etc. ); an adversative force. -- Ad*ver"sa*tive*ly, adv.