hendeca-
before a vowel hendec-; sometimes erron. endeca-. a. Combining form of Gr. ἕνδεκα eleven, occurring in scientific or technical words, as hendecachord (hɛnˈdɛkəkɔːd) Mus. [after tetrachord, hexachord], a series or scale of eleven notes; hence hendecaˈchordal a., relating to such a scale. hendecaˈcolic a. Pros., consisting of eleven cola (see colon2 1). hendecagynous (hɛndɪˈkædʒɪnəs) a. Bot. [see -gynous], having eleven pistils. hendecaˈhedron Geom. [Gr. ἕδρα seat, base], a solid figure contained by eleven faces. hendeˈcandrous a. Bot. [see -androus], having eleven stamens. hendecaphyllous (-ˈfɪləs) a. Bot., (of a leaf) consisting of eleven leaflets. ˈhendecarchy (-ɑːkɪ) [after heptarchy], government by eleven persons. hendecasemic (-ˈsiːmɪk) a. Pros. [cf. disemic], of the value of eleven moræ or units of time.
| 1760 Stiles in Phil. Trans. LI. 771 Two other suppositions, viz. that either the *hendecachord or disdiapason was here meant. |
| 1842–3 Smith's Dict. Gr. & Rom. Antiq. 646 A *hendecachordal system, consisting of three tetrachords. |
| 1847 Craig, *Endecagynous. |
| 1663 Flagellum, or O. Cromwell (1672) 164 England being now cantoned under this *Hendecharchy. |
b. Organic Chem. Occas. used in place of the synonymous and more usual prefix
undeca- to denote the presence in a molecule of eleven carbon atoms, as in
ˈhendecane, undecane;
hendeˈcoic acid, undecoic acid.
| 1889 Muir & Morley Watts' Dict. Chem. II. 673/1 n-Hendecane C11H24... Formed by the action of HI and phosphorus at 230° upon hendecoic (undecylic) acid. 1943 Thorpe's Dict. Appl. Chem. (ed. 4) VI. 204/1 (heading) Hendecoic acids (undecoic acids), C11H22O2. 1960 Handbk. Chem. Soc. Authors iii. 49 Greek numeral roots are used, except that 9 (alone or in combination) is rendered by the Latin nona (not the Greek ennea) and 11 by the Latin undeca (not the Greek hendeca). |