- lyssacine
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adj. [Gr. lysis, loosen; akis, point](PORIFERA: Hexactinellida)Skeletal framework formed by interlacing of the elongate rays of hexactines producing loose networks with irregular meshes in siliceous sponges; may be considered an earlier stage of the dictyonine framework.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.