| 单词 | primary root |
| 释义 | primary rootnoun Botany.the first root produced by a germinating seed, developing from the radicle of the embryo. Origin of primary rootFirst recorded in 1885–90 Words nearby primary rootprimary pulmonary lobule, primary qualities, primary quality, primary rainbow, primary reaction, primary root, primary school, primary sex characteristic, primary spermatocyte, primary stress, primary structure Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Scientific definitions for primary rootprimary root The first root of a plant, originating in the embryo. In gymnosperms, eudicotyledons, and magnoliids, the primary root develops into the taproot. In monocotyledons, the primary root disintegrates as the lateral roots develop into a system of fibrous roots. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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