cal — meaning in English

English meaning

chalk noun A soft white rock made of limestone, or a stick of similar material used for writing or drawing.
lime noun A small, round, green citrus fruit with a sharp, tart flavor.
whitewash noun A cheap white paint made from lime or chalk mixed with water, used to coat walls and fences.

cal is used for these senses in English:

chalk (countable) A piece of chalk, or nowadays processed compressed gypsum (calcium sulfate, CaSO4), that is used for drawing and for writing on a blackboard (chalkboard).
lime (chemistry) Any inorganic material containing calcium, usually calcium oxide (quicklime) or calcium hydroxide (slaked lime).
whitewash (uncountable) A mixture of a powdered mineral substance (often slaked lime (containing calcium hydroxide), chalk (calcium carbonate), or both) and water which is used for painting surfaces such as fences and walls bright white.

noun A soft white rock made of limestone, or a stick of similar material used for writing or drawing.
noun Powdered chalk-like substance used to improve grip in climbing, gymnastics, or weightlifting.
verb To mark or write something using chalk.

noun A small, round, green citrus fruit with a sharp, tart flavor.
noun A bright, slightly yellowish-green color.
noun Calcium oxide or calcium hydroxide, used in construction, farming, and industry.
noun A deciduous tree of the genus Tilia, also called the linden — unrelated to the citrus tree.
verb To treat soil or material with lime (the mineral).