A white coat or laboratory coat (often abbreviated to lab coat) is a knee - length overcoat /smock worn by professionals in the medical field or by those involved in laboratory work. The coat protects their street clothes and also serves as a simple uniform. The garment is made from white or light -colored cotton, linen, or cotton polyester blend, allowing it to be washed at high temperature and making it easy to see if it is clean.
Similar coats are a symbol of learning in Argentina and Uruguay, where they are worn by both students and teachers in state schools. In Tunisia and Mozambique, teachers wear white coats to protect their street clothes from chalk.
Like the word "suit", the phrase " white coat" is sometimes used as a synecdoche to denote the wearer, such as a scientist working in a high-tech company.
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