Merriam-Webster Collegiate Dictionary - domoic acid

 noun  Etymology: Japanese domoi, the alga Chondria armata  Date: 1982 a neurotoxin C15H21NO6 that is produced by some diatoms (especially genus Pseudonitzchia) and has caused poisoning in vertebrates (as sea lions, birds, and humans) that have consumed diatom-contaminated fish or shellfish