Ключевые слова: analysis, atom, biology, cell, chemical, chemistry, chromosome, color, colorful, concept, contour, drop, droplet, dropper, element, experiment, eyedropper, formula, gas, genetic, health, human, icon, illustration, instrument, isolated, laboratory, line, linear, liquid, medical, medicine, model, molecular, molecule, o3, outline, oxygen, research, science, set, shape, sign, structure, symbol, test,