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