triradiateadj.n.
/trʌɪˈreɪdɪət/ A. adj.
Having or consisting of three rays; radiating in three directions from a central point; three-rayed, trifurcate.
ΘΚΠ
the world > space > relative position > inclination > divergence > [adjective] > characterized by radial divergence > having radiating parts > many or spec. number
triradiated1786
octoradiated1828
multiradiated1840
multiradiate1846
triradiate1846
octoradiate1857
triradiala1886
octoradial1890
octoradiant1911
1846 R. Patterson Introd. Zool. 60 Three beautiful little semicircular horny saws, arranged in a triradiate manner, so that their edges meet in the centre.
1874 M. C. Cooke Fungi 36 The triradiate spores of Asterosporium.
1875 T. H. Huxley in Encycl. Brit. I. 754/2 Each pterygoid..is a triradiate bone, with an anterior, an inner, and a posterior, or outer, ray.
B. n.
A triradiate sponge-spicule.
ΘΚΠ
the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > parts of > sponge spicule > having rays > having three rays
triod1887
triradiate1887
1887 W. J. Sollas in Encycl. Brit. XXII. 417/1 [articles Sponges] The shorter paired rays being termed basal, and the whole spicule a sagittal triradiate.
1911 A. Dendy in Encycl. Brit. XXV. 722/1 The triradiates and quadriradiates..are not simple spicules, but spicule-systems formed of three or four rays each originating independently from its own scleroblast.
Derivatives
triˈradiated adj. /traɪˈreɪdɪeɪtɪd/ = A.
/traɪˈreɪdɪeɪtɪd/ = A.ΘΚΠ
the world > space > relative position > inclination > divergence > [adjective] > characterized by radial divergence > having radiating parts > many or spec. number
triradiated1786
octoradiated1828
multiradiated1840
multiradiate1846
triradiate1846
octoradiate1857
triradiala1886
octoradial1890
octoradiant1911
1786 Philos. Trans. (Royal Soc.) 76 160 The cavity..is divided into..chambers or compartments by solid transverse septa, which communicate with each other by a triradiated aperture.
triˈradiately adv. in a triradiate manner ( Cent. Dict. 1891).
triradiˈation n. radiation in three directions; also, a triradiate figure or structure.
ΘΚΠ
the world > space > relative position > inclination > divergence > [noun] > radiating > in three directions
triradiationc1900
c1900 Buck's Handbk. Med. Sc. II. 177 The callosal eminence.., the hippocamp, and the occipital eminence form an irregular triradiation.
This entry has not yet been fully updated (first published 1915; most recently modified version published online December 2021).
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adj.n.1786