Gonad. Definition. noun, plural: gonads. The sex organ producing gametes. Supplement. The gonads pertain to the anatomical part of the body where sex cells (gametes) are synthesized. For instance, the gonads in females are the ovaries whereas in males are the testes.Word origin: from Greek gonos, procreation, genitals.onad. Definition. noun, plural: gonads. The sex organ producing gametes. Supplement. The gonads pertain to the anatomical part of the body where sex cells (gametes) are synthesized. For instance, the gonads in females are the ovaries whereas in males are the testes.
Water is considered hard when the pH level is above 8.5. Hard water does not pose a health risk, but can cause aesthetic problems such as: 1  Bitter taste to the water and beverages such as tea or coffee. 2  Scales on piping and fixtures that reduces the internal diameter and can reduce pressure. 3  Deposits on dishes and tubs and sinks.
Calcium and magnesium ions present as sulfates, chlorides, carbonates, and bicarbonates cause water to be hard. Water chemists measure water impurities in parts per million (ppm), but water hardness is often expressed in grains of hardness per gallon of water (gpg). The two systems can be converted mathematically.