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tylhexactine
tylhexactine n.
Brit. 
/ˌtɪlhɛkˈsaktɪn/
, /ˌtɪlhɛkˈsaktɪn/U.S. /ˌtɪlhɛkˈsæktən/
[see hexactine under hexa- comb. form] a six-rayed sponge-spicule having a knob at the end of each ray./ˌtɪlhɛkˈsæktən/ΘΚΠ
the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [noun] > member of > parts of > sponge spicule > having rays > having six rays
hexact1886
hexactine1887
tornhexactine1909
tylhexactine1909
1909 Cent. Dict. Suppl. Tylhexactine.
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as lemmas