DECADENT
De*ca"dent, a.
Defn: Decaying; deteriorating.
DECADIST
Dec"a*dist, n.
Defn: A writer of a book divided into decades; as, Livy was a decadist. [R.]
DECAGON
Dec"a*gon, n. Etym: [Pref. deca- + Gr. décagone.] (Geom.)
Defn: A plane figure having ten sides and ten angles; any figure having ten angles. A regular decagon is one that has all its sides and angles equal.
DECAGONAL
De*cag"o*nal, a.
Defn: Pertaining to a decagon; having ten sides.
DECAGRAM; DECAGRAMME
Dec"a*gram, Dec"a*gramme, n. Etym: [F. décagramme; Gr. gramme. See
Gram.]
Defn: A weight of the metric system; ten grams, equal to about 154.32 grains avoirdupois.