tardigrade(n = noun.animal) - an arthropod of the division Tardigrada;
is a kind of arthropod
has parts: stylet
is a member of class tardigrada, tardigrada

1.  Moving or stepping slowly; slow-paced. G. Eliot. [1913 Webster]

2.  Of or pertaining to the Tardigrada. [1913 Webster]

   One of the Tardigrada. [1913 Webster]

tardigrade, n. & adj.
--n. any minute freshwater animal of the phylum Tardigrada, having a short plump body and four pairs of short legs. Also called water bear.
--adj. of or relating to this phylum.

Etymology:
F tardigrade f. L tardigradus f. tardus slow + gradi walk

N  slowness, languor, drawl, creeping, lentor, retardation, slackening, delay, claudication, jog trot, dog trot, mincing steps, slow march, slow time, slow goer, slow coach, slow back, lingerer, loiterer, sluggard, tortoise, snail, poke, dawdle, slow, slack, tardy, dilatory, gentle, easy, leisurely, deliberate, gradual, insensible, imperceptible, glacial, languid, sluggish, slow paced, tardigrade, snail-like, creeping, reptatorial, slowly, leisurely, piano, adagio, largo, larghetto, at half speed, under easy sail, at a foots pace, at a snail's pace, at a funeral pace, in slow time, with mincing steps, with clipped wings, haud passibus aequis, gradually, gradatim, by degrees, by slow degrees, by inches, by little and little, step by step, one step at a time, inch by inch, bit by bit, little by little, seriatim, consecutively, dum Roma deliberat Saguntum perit, at a glacial pace.

N  animal, animal kingdom, fauna, brute creation, beast, brute, creature, critter, wight, created being, creeping thing, living thing, dumb animal, dumb creature, zoophyte, mammal, bird, reptile, amphibian, fish, crustacean, shellfish, mollusk, worm, insect, arthropod, microbe, microbe, animalcule, alligator, crocodile, saurian, dinosaur (extinct), snake, serpent, viper, eft, asp, aspick, frog, toad, trout, bass, tuna, muskelunge, sailfish, sardine, mackerel, ant, mosquito, bee, honeybee, tardigrade, spider, biped, quadruped, webfoot, flocks and herds, live stock, domestic animals, wild animals, game, ferae naturae, beasts of the field, fowls of the air, denizens of the sea, black game, black grouse, blackcock, duck, grouse, plover, rail, snipe, horse, cattle, kine, ox, bull, bullock, cow, milch cow, calf, heifer, shorthorn, sheep, lamb, lambkin, ewe, ram, tup, pig, swine, boar, hog, sow, steer, stot, tag, teg, bison, buffalo, yak, zebu, dog, cat, dog, hound, pup, puppy, whelp, cur, mongrel, house dog, watch dog, sheep dog, shepherd's dog, sporting dog, fancy dog, lap dog, toy dog, bull dog, badger dog, mastiff, blood hound, grey hound, stag hound, deer hound, fox hound, otter hound, harrier, beagle, spaniel, pointer, setter, retriever, Newfoundland, water dog, water spaniel, pug, poodle, turnspit, terrier, fox terrier, Skye terrier, Dandie Dinmont, collie, feline, puss, pussy, grimalkin, gib cat, tom cat, fox, Reynard, vixen, stag, deer, hart, buck, doe, roe, caribou, coyote, elk, moose, musk ox, sambar, bird, poultry, fowl, cock, hen, chicken, chanticleer, partlet, rooster, dunghill cock, barn door fowl, feathered tribes, feathered songster, singing bird, dicky bird, canary, warbler, finch, aberdevine, cushat, cygnet, ringdove, siskin, swan, wood pigeon, vermin, varmint, pest, animal, zoological equine, bovine, vaccine, canine, feline, fishy, piscatory, piscatorial, molluscous, vermicular, gallinaceous, rasorial, solidungulate, soliped.