nematocyst; cnidocyte; cnida
Zoological term for the stinging cell or organelle found in cnidarians (jellyfish, sea anemones, etc.).
Nematocysts are densely packed in the tentacles of jellyfish.
Cnidae are organelles unique to cnidarians.
cnidosac; cnidocystic sac
cnidarian
Compound of 刺 (し, 'sting') and 胞 (ほう, 'sac' or 'cell'), referring to the stinging capsule characteristic of cnidarians. The exact historical derivation is uncertain, but the term is a modern scientific coinage.