Zest is the outer, colored shell of citrus fruit and is often used for baking. Zest has become a synonym for spice, strong flavor or interesting taste. To remove the zest a zester, vegetable/potato peeler, or paring knife should be used to scrape the colored part of the peel off. The white membrane or pericarp under the zest is bitter so it is important to be careful to not cut too deep. Species & major hybrids Species Citrus maxima - Pomelo Citrus medica - Citron Citrus reticulata - Mandarin & Tangerine Major hybrids Citrus x aurantifolia - Lime Citrus x aurantium - Bitter Orange Citrus x bergamia - Bergamot Citrus x hystrix - Kaffir Lime Citrus x ichangensis - Ichang Lemon Citrus x limon - Lemon Citrus x limonia - Rangpur Citrus x paradisi... Screen shot of Spice OPUS, a fork of Berkeley SPICE SPICE (Simulation Program with Integrated Circuits Emphasis) is a general purpose analog circuit simulator. ... Flavor (AmE) or flavour (CwE) is the sensory impression of a food or other substance. ... Taste is one of the most common and fundamental of the senses of animals. ... Peeler is also a slang word for a British constable A potato peeler A potato peeler is a metal blade attached to a metal, plastic or wooden handle that is used for peeling vegetables, usually potatoes. ... // A kitchen knife is any knife that is used in a kitchen. ... Species Elaeis guineensis Elaeis oleifera The oil palms (Elaeis) coomprise two species of the Arecaceae, or palm family. ...