isogenn.

/ˈʌɪsədʒɛn/

Etymology: < iso- comb. form + Greek γένος offspring.

A line or curve in a diagram showing the various combination of the ages of the parents which are associated with the same average birthrate.

ΚΠ

1894 F. Galton in Proc. Royal Soc. 55 18 In natality tables, the ages of the father and mother take the place of the latitudes and longitudes in weather charts, and lines of similar birth-rates, or, as I would call them, ‘isogens’, take the place of isobars.

This entry has not yet been fully updated (first published 1900; most recently modified version published online March 2018).

单词	isogen
释义	isogenn. /ˈʌɪsədʒɛn/ Etymology: < iso- comb. form + Greek γένος offspring. A line or curve in a diagram showing the various combination of the ages of the parents which are associated with the same average birthrate. ΚΠ 1894 F. Galton in Proc. Royal Soc. 55 18 In natality tables, the ages of the father and mother take the place of the latitudes and longitudes in weather charts, and lines of similar birth-rates, or, as I would call them, ‘isogens’, take the place of isobars. This entry has not yet been fully updated (first published 1900; most recently modified version published online March 2018). < n.1894
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