| 单词 | bluejack |
| 释义 | bluejack in British English (ˈbluːˌdʒæk) noun a species of oak, Quercus incana, the leaves of which have a blue tinge bluejack in American English (ˈbluˌdʒæk) noun a small oak (Quercus incana) of the S U.S. bluejack in American English (ˈbluːˌdʒæk) noun a small oak, Quercus incana, of the southern U.S., having crooked branches and blue-green leaves Also called: bluejack oak Word origin [1855–60, Amer.; blue + jack1, modeled after blackjack; so called from the bluish look of the leaves]This word is first recorded in the period 1855–60. Other words that entered Englishat around the same time include: barrage, keyword, lavabo, specialist, superheat |
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