Definition of Lithistida
in former classifications
: an order of sponges (class Demospongiae) comprising well-preserved fossil sponges with a massive reticulate skeleton of fused siliceous spicules
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Origin and Etymology of lithistida
New Latin, from (assumed) Greek lithistos (verbal of Greek lithizein to resemble a stone, from lith- + -izein -ize) + New Latin -ida
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