| Achromatic 1. (a.) Free from color; transmitting light without decomposing it into its primary colors. 2. (a.) Uncolored; not absorbing color from a fluid; -- said of tissue. Thesaurus Entries achromatic, anemic, ashen, ashy, bled white, bloodless, cadaverous, chloranemic, colorless, dead, deadly pale, deathly pale, dim, dimmed, dingy, discolored, dull, etiolated, exsanguinated, exsanguine, exsanguineous, faded, faint, fallow, flat, ghastly, gray, haggard, hueless, hypochromic, lackluster, leaden, livid, lurid, lusterless, mat, mealy, muddy, neutral, pale, pale as death, pale-faced, pallid, pasty, sallow, sickly, tallow-faced, toneless, uncolored, wan, washed-out, waxen, weak, whey-faced, white |