Rhubarb cultivars have gained the Royal Horticultural Society’s Award of Garden Merit:- "Rhubarb" originally comes from the two Greek words for rhubarb. "Rheon" from the Persian "rewend", later became the Latin word "rheum", meaning rhubarb. The other Greek word is "rha", an ancient name for the Volga River in Russian, where rhubarb was cultivated, having been introduced there from China via the Silk Road. In medieval Latin, "rheon" and "rha" became "rheum barbarum", literally "foreign rhubarb" or "strange rhubarb", and evolved later into "rheubarbarum". Most likely, the English word "rhubarb" entered the language via the French word "rhubarbe" brought over by
Calculation also involve algorithmic calculations, but produces ranges of possibilities rather than exact answers. To "calculate" means to determine mathematically in the case of a number or amount, or in the case of an abstract problem to deduce the answer using logic, reason or common sense. The English word derives from the Latin "calculus", which originally meant a small stone in the gall-bladder (from Latin "calx"). It also meant a pebble used for calculating, or a small stone used as a counter in an abacus (Latin "abacus", Greek "abax"). The abacus was an instrument used by Greeks and Romans for arithmetic