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In terms of fruit anatomy, the zest is obtained from the flavedo which is also called zest. [1] The flavedo and white pith ( albedo ) of a citrus fruit together makes up its peel . [ 2 ] The amounts of both flavedo and pith are variable among citrus fruits, and may be adjusted by the manner in which they are prepared.
Albedo (/ æ l ˈ b iː d oʊ / al-BEE-doh; from Latin albedo 'whiteness') is the fraction of sunlight that is diffusely reflected by a body. It is measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects all incident radiation).
A fruit with a thick peel, such as a citrus fruit, is called a hesperidium. In hesperidia, the inner layer (also called albedo or, among non-botanists, pith) [1] is peeled off together with the outer layer (called flavedo), and together they are called the peel. [2] The flavedo and albedo, respectively, are the exocarp and the mesocarp.
The term pith is also used to refer to the pale, spongy inner layer of the rind, more properly called mesocarp or albedo, of citrus fruits (such as oranges) and other hesperidia. The word comes from the Old English word piþa, meaning substance, akin to Middle Dutch pitte (modern Dutch pit), meaning the pit of a fruit. [2]
The pomegranate fruit husk is red-purple in color with an outer, hard pericarp, and an inner, spongy mesocarp (white "albedo"), which comprises the fruit inner wall where seeds attach. [17] Membranes of the mesocarp are organized as nonsymmetric chambers that contain seeds which are embedded without attachment to the mesocarp. [ 17 ]
"Mesocarp" may also refer to any fruit that is fleshy throughout. In a hesperidium, the mesocarp is the inner part of the peel and is commonly removed before eating, as is found in citrus fruit. [8] It is also referred to as albedo or pith. In citron fruit, where the mesocarp is the most prominent part, it is used to produce succade.
A pure citron of any kind has a large portion of albedo, which is important for the production of succade Location of mesocarp or albedo in a sweet orange. While the word Succade was widely used in German, [11] today it is usually called Zitronat. The French call it fruit glacé or fruit confit, and is also known as candied fruit or ...
Unlike most other berries, the rind of cultivated hesperidia is generally not eaten with the fruit because it is tough and bitter. A common exception is the kumquat , which is consumed entirely. The outermost, pigmented layer of rind contains essential oils and is known as the flavedo .