珪
Start learning with MaruMori now and gain access to in-depth Grammar Lessons, Vocabulary, Kanji and Grammar SRS, Reading Exercises, Mock Exams, Mini Games and more!
珪質海綿
けいしつかいめん
siliceous spongeけ い し つ か い め ん
1. Siliceous sponge (any sponge other than those of class Calcarea)