IPA: /sæk/
KK: /sæk/
A bag-like structure in a plant or animal that can hold fluid or other substances.
The doctor explained that the sac around the heart helps protect it.
The word 'sac' originates from Latin 'saccus' (meaning bag or sack), which refers to a pouch or container. It is used in English to denote a bag-like structure, often in a biological context.
Think of a 'bag' ('saccus') that holds something — that's why 'sac' refers to a pouch or container.