| 单词 | acorn worm |
| 释义 | acorn worm in British Englishnoun any of various small burrowing marine animals of the genus Balanoglossus and related genera, having an elongated wormlike body with an acorn-shaped eversible proboscis at the head end: subphylum Hemichordata (hemichordates) acorn worm in American Englishnoun any of several burrowing, often brilliantly colored hemichordates of the class Enteropneusta, usually found in intertidal sand and mud, having an acorn-shaped proboscis and collar Also: acornworm Word origin [1885–90]This word is first recorded in the period 1885–90. Other words that entered Englishat around the same time include: booster, lineup, retread, toner, twofer |
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