| 单词 | aplacental |
| 释义 | aplacental in British English (ˌeɪpləˈsɛntəl, ˌæplə-) adjective (of monotremes and marsupials) having no placenta aplacental in American English (ˌeɪpləˈsɛntəl) adjective having no true placenta, as any marsupial aplacental in American English (ˌeipləˈsentl, ˌæplə-) adjective Zoology having or forming no placenta, as the marsupials and monotremes Word origin [1855–60; a-6 + placental]This word is first recorded in the period 1855–60. Other words that entered Englishat around the same time include: boilerplate, keyword, lavabo, output, specialist |
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