The term COW'S LOWS is a crossword solution which is made up of two words: MOOS (4 letters) and LOWS (4 letters). MOOS is an onomatopoeic word which is used to describe the sound that cows make. LOWS is a word which is used to describe the low-pitched sound that cows make. Therefore, the term COW'S LOWS is used to describe the sound that cows make, which is a combination of both high-pitched and low-pitched sounds.