De*cen"ni*al (?), a. [See Decennary.] Consisting of ten years; happening every ten years; as, a decennial period; decennial games. Hallam.
De*cen"ni*al, n. A tenth year or tenth anniversary.
||De*cen"ni*um (?), n.; pl. Decenniums (#), L. Decennia (#). [L.] A period of ten years. "The present decennium." Hallam. "The last decennium of Chaucer's life." A. W. Ward.
{ De*cen"no*val (?), De*cen"no*va*ry (?), } a. [L. decem ten + novem nine.] Pertaining to the number nineteen; of nineteen years. [R.] Holder.
De"cent (d"sent), a. [L. decens, decentis, p. pr. of decere to be fitting or becoming; akin to decus glory, honor, ornament, Gr. dokei^n to seem good, to seem, think; cf. Skr. dç to grant, to give; and perh. akin to E. attire, tire: cf. F. décent. Cf. Decorate, Decorum, Deign.] 1. Suitable in words, behavior, dress, or ceremony; becoming; fit; decorous; proper; seemly; as, decent conduct; decent language. Shak.
Before his decent steps.
Milton.