Deciduous and semi-deciduous are technical terms of Botany and other disciplines. Semideciduous derives from the Latin prefix semi - derived in turn from the Greek hemi, half of something and deciduus, derived from the verb adjective decide ( 41 cado; fall, die, succumb. Therefore it means semicaduco, although probably this word nor the dictionary admit us. Botanists qualify so the forests in which half, roughly, of the trees are deciduous and the other half are Evergreen
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