rapeseed

plant
Also known as: Brassica napus, variety napus, colza, rape
Also called:
rape or colza

rapeseed, (Brassica napus, variety napus), plant of the mustard family (Brassicaceae) grown for its seeds, which yield canola, or rapeseed, oil. Canola oil is variously used in cooking, as an ingredient in soap and margarine, and as a lamp fuel (colza oil). The esterified form of the oil is used as a lubricant for jet engines and can be made into biodiesel. The seeds are also used as bird feed, and the seed residue after oil extraction is used for fodder. The plant can be grown as a cover crop and green manure.

Rapeseed is an annual plant, 30 cm (1 foot) or more tall, with a long, usually thin taproot. Its leaves are smooth, bluish green, and deeply scalloped, and the bases of the upper leaves clasp the stem. Rapeseed bears four-petaled yellow flowers in spikes. Each elongated round pod has a short beak and contains many seeds.

The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Melissa Petruzzello.
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