| 单词 | xylem ray |
| 释义 | xylem ray in American English a transverse sheet of soft, living cells wholly within the wood or xylem and extending from the pith of a stem to the phloem xylem ray in American Englishnoun a vascular ray extending into or located entirely within the secondary xylem Also called: wood ray Word origin [1870–75]This word is first recorded in the period 1870–75. Other words that entered Englishat around the same time include: Mafia, billing, giveaway, immobilize, onshore |
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