A macronucleus (formerly also meganucleus) is the larger type of nucleus in ciliates. Macronuclei are polyploid and undergo direct division without mitosis.
例句与用法
1.
A unicellular protoctist of the phylum ciliophora , whose members are usually covered in short undulipodia ( cilia ) and have two different kinds of nuclei , micronuclei and macronuclei 2纤毛虫：纤毛虫纲的一类原生单细胞生物。该类生物具有短的纤毛，还具有两个细胞核，一个是大核，另一个是小核。
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