fern seed(n = noun.plant) - the asexual spore of ferns that resembles dust; once thought to be seeds and to make the possessor invisible;
is a kind of spore
is a part of fern

adder's fern, adder's tongue fern, alabama lip fern, alpine lady fern, amber seed, american maidenhair fern, american parsley fern, american wall fern, annual fern, aquatic fern, asparagus fern, ball fern, bamboo fern, basket fern, bead fern, bear's-paw fern, beech fern, bermuda maidenhair fern, berry fern, bird's nest fern, bird's-foot fern, black tree fern, bladder fern, boston fern, boulder fern, braun's holly fern, bristle fern, brittle bladder fern, brittle fern, brittle maidenhair fern, broad beech fern, buckler fern, bulblet bladder fern, bulblet fern, button fern, california fern, canary island hare's foot fern, canary seed, caraway seed, caraway seed bread, carolina pond fern, celery seed, central american strap fern, chain fern, christmas fern, cinnamon fern, climbing bird's nest fern, climbing fern, climbing maidenhair fern, clover fern, coffee fern, cola seed, common staghorn fern, coriander seed, cotton seed, cow-tongue fern, crape fern, creeping fern, crepe fern, cumin seed, curly grass fern, dagger fern, daisy-leaved grape fern, daisyleaf grape fern, deer fern, dill seed, ditch fern, edible seed, elkhorn fern, european parsley fern, evergreen wood fern, fan fern, farley maidenhair fern, felt fern, fennel seed, fenugreek seed, fern, fern ally, fern family, fern genus, fern palm, fern rhapis, fiddlehead fern, film fern, filmy fern, five-fingered maidenhair fern, floating fern, florida strap fern, flower-cup fern, flowering fern, fragile fern, fragrant cliff fern, fragrant shield fern, fragrant wood fern, giant fern, giant scrambling fern, glade fern, glory fern, gold fern, golden fern, goldie's fern, goldie's shield fern, goldie's wood fern, gone to seed, grape fern, grass fern, hairy lip fern, hand fern, hard fern, hare's-foot bristle fern, hare's-foot fern, hart's-tongue fern, hartford fern, hay-scented fern, holly fern, indian button fern, interrupted fern, jersey fern, jumping seed, kidney fern, killarney fern, king fern, lace fern, lady fern, leather fern, leatherleaf fern, leatherleaf wood fern, leathery grape fern, licorice fern, limestone fern, lip fern, long beech fern, maidenhair fern, male fern, marginal wood fern, marsh fern, massachusetts fern, meadow fern, mosquito fern, mountain bladder fern, mountain fern, mountain male fern, mountain parsley fern, mustard seed, narrow beech fern, narrow-leaved strap fern, nebraska fern, neem seed, new york fern, nicker seed, northern beech fern, northern holly fern, northern oak fern, oak fern, oil-rich seed, oleander fern, ostrich fern, pine fern, poppy seed, potato fern, prickly shield fern, prince-of-wales fern, pumpkin seed, rabbit's-foot fern, rasp fern, rattlesnake fern, resurrection fern, ribbon fern, royal fern, safflower seed, sago fern, scale fern, scaly fern, scented fern, sea fern, seed, seed beetle, seed cake, seed catalog, seed catalogue, seed coat, seed corn, seed fern, seed grain, seed lac, seed leaf, seed money, seed oyster, seed pearl, seed plant, seed shrimp, seed stock, seed vessel, seed weevil, sensitive fern, serpent fern, sesame seed, shield fern, shuttlecock fern, silkworm seed, silver fern, silver tree fern, skeleton fork fern, smooth lip fern, snake fern, snuffbox fern, soft shield fern, soft tree fern, southern beech fern, southwestern lip fern, spider fern, squirrel's-foot fern, stag-horn fern, staghorn fern, strap fern, sunflower seed, sweet fern, sword fern, ten-day fern, til seed, tilley seed, tongue fern, toothed sword fern, tree fern, umbrella fern, venus'-hair fern, virginia chain fern, walking fern, wall fern, water fern, western holly fern, whisk fern, winter fern, wood fern, wooly lip fern