verticillation
(vɜːtɪsɪˈleɪʃən)
[f. verticillate a.: see -ation.]
The formation of verticils; a verticillate form or structure, a verticil.
| 1830 Lindley Nat. Syst. Bot. 297 The degree of verticillation requisite to constitute a calyx. 1843 Penny Cycl. XXVI. 131/2 The tail is rounded..; its verticillations are composed, above, of large tubercles, and below, of flat, quadrangular scales. 1888 Riverside Nat. Hist. I. 167 In the Diadematidæ the spines are hollow, long, and set with rings or verticillations. |