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homochronous
homochronous adj. 
/hɒˈmɒkrənəs/, /həˈmɑkrənəs/ [Greek χρόνος time] occurring at the same time, or at corresponding times (cf. heterochronous adj.).
Brit. /hə(ʊ)ˈmɒkrənəs/
, /hə(ʊ)ˈmɒkrənəs//hɒˈmɒkrənəs/U.S. /hoʊˈmɑkrənəs/
, /hoʊˈmɑkrənəs//həˈmɑkrənəs/ΘΚΠ
the world > time > relative time > simultaneity or contemporaneousness > [adjective]
altogether?c1400
concurrent1495
contemporana1500
unison1582
coincident1598
coetaneal1614
coactivea1616
contemporal1621
synchronisticalc1624
coetanean1625
coetaneous1649
coinstantanean1652
synchronical1652
simultal1654
contemporary1656
contemporaneous1659
simultaneousa1660
coevous1660
synchronal1660
coexistent1662
implicit1662
synchronous1669
coexistinga1676
synchronistic1685
coeval1714
contemporany1721
synchronizinga1727
joint1765
coinstantaneous1768
consentaneous1775
coinciding1786
conterminating1805
synchronic1833
coincidental1845
parallel1859
homochronous1876
monochronic1905
co-occurring1951
co-occurrent1954
1876 E. R. Lankester tr. E. Haeckel Hist. Creation I. 217 The law of contemporaneous or homochronous transmission, which Darwin calls the law of ‘transmission in corresponding periods of life’.
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