Decad *to* Deceive

**Decad**

(Dec"ad) *n.* A decade.

Averill was a *decad* and a half his elder.

*Tennyson.* **Decadal**

(Dec"a*dal) *a.* Pertaining to ten; consisting of tens.

**Decade**

(Dec"ade) *n.* [F. *décade*, L. *decas*, *-adis*, fr. Gr. fr. de`ka ten. See Ten.] A group or division
of ten; esp., a period of ten years; a decennium; as, a *decade* of years or days; a *decade* of soldiers; the
second *decade* of Livy. [Written also *decad*.]

During this notable *decade* of years.

*Gladstone.* **Decadence**

(De*ca"dence De*ca"den*cy) *n.* [LL. *decadentia*; L. *de-* + *cadere* to fall: cf. F. *décadence*.
See Decay.] A falling away; decay; deterioration; declension. "The old castle, where the family lived in
their *decadence*." *Sir W. Scott.*

**Decadent**

(De*ca"dent) *a.* Decaying; deteriorating.

**Decadist**

(Dec"a*dist) *n.* A writer of a book divided into decades; as, Livy was a *decadist*. [R.]

**Decagon**

(Dec"a*gon) *n.* [Pref. *deca-* + Gr. a corner or angle: cf. F. *décagone*.] *(Geom.)* 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.* Pertaining to a decagon; having ten sides.

**Decagram**

(Dec"a*gram, Dec"a*gramme) *n.* [F. *décagramme*; Gr. de`ka ten + F. *gramme*. See Gram.]
A weight of the metric system; ten grams, equal to about 154.32 grains avoirdupois.

**Decagynia**

(||Dec`a*gyn"i*a) *n. pl.* [NL., fr. Gr. de`ka ten + a woman, a female.] *(Bot.)* A Linnæan order
of plants characterized by having ten styles.

**Decagynian**

(Dec`a*gyn"i*an Dec*cag"y*nous) *a.* [Cf. F. *décagyne*.] *(Bot.)* Belonging to the Decagynia; having
ten styles.

**Decahedral**

(Dec`a*he"dral) *a.* Having ten sides.

**Decahedron**

(Dec`a*he"dron) *n.*; *pl.* E. **Decahedrons** L. **Decahedra** [Pref. *deca-* + Gr. 'e`dra a
seat, a base, fr. 'e`zesthai to sit: cf. F. *décaèdre*.] *(Geom.)* A solid figure or body inclosed by ten plane
surfaces. [Written also, less correctly, *decaedron*.]

**Decalcification**

(De*cal`ci*fi*ca"tion) *n.* The removal of calcareous matter.

**Decalcify**

(De*cal"ci*fy) *v. t.* [*imp. & p. p.* Decalcified ; *p. pr. & vb. n.* Decalcifying.] To deprive of
calcareous matter; thus, to *decalcify* bones is to remove the stony part, and leave only the gelatin.

**Decalcomania**

(De*cal`co*ma"ni*a De*cal`co*ma"nie) *n.* [F. *décalcomanie*.] The art or process of transferring
pictures and designs to china, glass, marble, etc., and permanently fixing them thereto.

**Decaliter**

(Dec"a*li`ter, Dec"a*li`tre) *n.* [F. *décalitre*; Gr. de`ka ten + F. *litre*. See Liter.] A measure of
capacity in the metric system; a cubic volume of ten liters, equal to about 610.24 cubic inches, that is,
2.642 wine gallons.

**Decalog**

(Dec"a*log) *n.* Decalogue.

**Decalogist**

(De*cal"o*gist) *n.* One who explains the decalogue. *J. Gregory.*