nematode, nematode worm, roundworm
["loupe, jeweler's loupe", 'diamondback, diamondback rattlesnake, Crotalus adamanteus', 'chambered nautilus, pearly nautilus, nautilus', 'projectile, missile', 'knot', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus', 'earthstar']