biconen.
/ˈbʌɪkəʊn/ An object having the form of two cones placed base to base; esp. of beads. Also attributive.
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the world > space > shape > curvature > curved three-dimensional shape or body > [noun] > two cones base-to-base
bicone1928
1928 H. C. Beck in Archaeologia 77 7 Bicone. Beads in which the profile consists of two straight lines, at an angle to one another, which meet the perforation.
1928 H. C. Beck in Archaeologia 77 25 (caption) Bicone fluted bead. Agate, Ur.
1931 Antiquity 5 428 The faience beads include all the simple forms such as oblate, spherical..bicone..and cylindrical.
1937 Mond & Myers Cemeteries of Armant I. v. 70 It is often difficult to tell whether a bead is..a long barrel [or]..a long truncated convex bicone.
This entry has not yet been fully updated (first published 1972; most recently modified version published online September 2018).
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n.1928