infinitesimal

very small in size a soft drink with only an infinitesimal amount of caffeine Synonyms atomic, bitsy, bitty, tiny, itty-bitty (or itsy-bitsy), little bitty, microminiature, microscopic (also microscopical), miniature, minuscule, minute, teensy, teensy-weensy, teeny, teeny-weeny, wee, weeny (also weensy)Related Words baby, diminutive, dwarf, elfin, half-pint, Lilliputian, little, micro, mini, minikin, model, petite, pocket, pocket-size (also pocket-sized), pygmy, small, smallish; dinky, dwarfish, insignificant, pint-size (or pint-sized), puny, scrubby, undersized (also undersize)Near Antonyms big, bulky, bumper, considerable, extensive, good, goodly, grand, great, gross, handsome, hefty, hulking, jumbo, king-size (or king-sized), large, largish, major, outsize (also outsized), overgrown, overscale (or overscaled), oversize (or oversized), sizable (or sizeable), substantial, super, whacking, whopping; formidable, grandiose, imposing, lofty, majestic, monolithic, staggering, stupendous, towering; boundless, cavernous, immeasurable, infinite, vast, vasty, voluminousAntonyms astronomical (also astronomic), colossal, cosmic (also cosmical), elephantine, enormous, giant, gigantic, herculean, heroic (also heroical), huge, immense, mammoth, massive, monster, monstrous, monumental, mountainous, planetary, prodigious, titanic, tremendous