hep·tad 
(hĕptăd′)
(hĕptăd′)n.
A group or series of seven.
[Greek heptas, heptad-, the number seven, from hepta, seven; see sept in the Appendix of Indo-European roots.]
| 单词 | heptad |
| 释义 | hep·tad (hĕptăd′)n. A group or series of seven. [Greek heptas, heptad-, the number seven, from hepta, seven; see sept in the Appendix of Indo-European roots.] |
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