eo-comb. form

Stress is usually determined by a subsequent element and vowels may be reduced accordingly.

Employed as combining form of Greek ἠώς dawn, chiefly in Geology and Palaeontology. First used in Eocene adj., with the sense ‘characterized by the “dawn” or faintly recognizable beginnings of’ (the recent fauna and flora). Also in modern Latin names of fossil genera, believed to be the earliest representatives of types still existing.

eophytic adj.

Brit.

/ˌiːə(ʊ)ˈfɪtɪk/

U.S.

/ˌiəˈfɪdɪk/

/ˌioʊˈfɪdɪk/

[+ Greek ϕυτόν plant + -ic suffix] characterized by the earliest appearance of plant-life.

ΚΠ

1880 J. W. Dawson Story Earth & Man (ed. 6) ii. 32 An Eophytic period preceding the Eozoic.

eozoic adj.

Brit.

/ˌiːə(ʊ)ˈzəʊɪk/

U.S.

/ˌiəˈzoʊɪk/

/ˌioʊˈzoʊɪk/

[+ Greek ζῷον animal] characterized by the earliest appearance of animal life; said of the Laurentian strata and the period represented by them.

ΚΠ

1871 Hunt in Proc. Amer. Assoc. Sci. 53 Subsequently to the eozoic times, silicated rocks..are comparatively rare.

1873 J. W. Dawson Story Earth & Man ii. 18 Eozoic or those [rocks] that afford the traces of the earliest known living beings.

Eohippus n.

Brit.

/ˌiːə(ʊ)ˈhɪpəs/

U.S.

/ˌioʊˈhɪpəs/

/ˌiəˈhɪpəs/

[+ Greek ἵππος horse] the oldest known genus of the horse family.

ΘΚΠ

the world > animals > mammals > group Ungulata (hoofed) > family Equidae (general equines) > [noun] > extinct or prehistoric equines

opeagha1776

hyracotherium1840

hipparion1856

Protohippus1870

Miohippus1874

Pliohippus1874

Mesohippus1875

Orohippus1877

Eohippus1879

1879 J. Le Conte Elements Geol. (new ed.) 504 Eohippus..a small animal no bigger than a fox, having three toes on the hind foot and four perfect ones on the fore foot.

1880 T. H. Huxley in Times 25 Dec. 4/1 I do not see..any reason to doubt that the eocene equidæ were preceded by mesozoic forms, which differed from eohippus in the same way as eohippus differs from equus.

Categories »

Eopteris n.

Brit.

/ɪˈɒpt(ə)rɪs/

U.S.

/iˈɑpt(ə)rəs/

[+ Greek πτερίς fern] a genus including the oldest known fern.

Eosaurus n.

Brit.

/ˌiːə(ʊ)ˈsɔːrəs/

U.S.

/ˌiəˈsɔrəs/

/ˌioʊˈsɔrəs/

the oldest known genus of saurians.

ΚΠ

1879 J. Le Conte Elements Geol. (new ed.) 404 Unless we except the Eosaurus, these are the first true reptiles found.

Eozoon n.

Brit.

/ˌiːə(ʊ)ˈzəʊən/

/ˌiːə(ʊ)ˈzəʊɒn/

U.S.

/ˌiəˈzoʊˌɑn/

/ˌioʊˈzoʊˌɑn/

[+ Greek ζῷον animal] a supposed genus of foraminifers or rhizopods, at one time regarded as the earliest known animal; its alleged remains are now believed to be of inorganic origin.

ΚΠ

1866 C. Darwin Origin of Species (ed. 4) ix. 371 Within the last year the great discovery of the Eozoon in the Laurentian formation of Canada has been made.

Eoˈzoonal adj.

Brit.

/ˌiːə(ʊ)ˈzəʊənl/

U.S.

/ˌiəˈzoʊən(ə)l/

/ˌioʊˈzoʊən(ə)l/

pertaining to the eozoon.

ΚΠ

1879 J. Le Conte Elements Geol. (new ed.) 275 A section of an Eozoönal mass.

1881 R. Etheridge in Jrnl. Geol. Soc. 38 54 The prevalent limestones, Eozoonal or otherwise.

This entry has not yet been fully updated (first published 1891; most recently modified version published online March 2022).

单词	eo-
释义	eo-comb. form Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Employed as combining form of Greek ἠώς dawn, chiefly in Geology and Palaeontology. First used in Eocene adj., with the sense ‘characterized by the “dawn” or faintly recognizable beginnings of’ (the recent fauna and flora). Also in modern Latin names of fossil genera, believed to be the earliest representatives of types still existing. eophytic adj. Brit. /ˌiːə(ʊ)ˈfɪtɪk/ , U.S. /ˌiəˈfɪdɪk/ , /ˌioʊˈfɪdɪk/ [+ Greek ϕυτόν plant + -ic suffix] characterized by the earliest appearance of plant-life. ΚΠ 1880 J. W. Dawson Story Earth & Man (ed. 6) ii. 32 An Eophytic period preceding the Eozoic. eozoic adj. Brit. /ˌiːə(ʊ)ˈzəʊɪk/ , U.S. /ˌiəˈzoʊɪk/ , /ˌioʊˈzoʊɪk/ [+ Greek ζῷον animal] characterized by the earliest appearance of animal life; said of the Laurentian strata and the period represented by them. ΚΠ 1871 Hunt in Proc. Amer. Assoc. Sci. 53 Subsequently to the eozoic times, silicated rocks..are comparatively rare. 1873 J. W. Dawson Story Earth & Man ii. 18 Eozoic or those [rocks] that afford the traces of the earliest known living beings. Eohippus n. Brit. /ˌiːə(ʊ)ˈhɪpəs/ , U.S. /ˌioʊˈhɪpəs/ , /ˌiəˈhɪpəs/ [+ Greek ἵππος horse] the oldest known genus of the horse family. ΘΚΠ the world > animals > mammals > group Ungulata (hoofed) > family Equidae (general equines) > [noun] > extinct or prehistoric equines opeagha1776 hyracotherium1840 hipparion1856 Protohippus1870 Miohippus1874 Pliohippus1874 Mesohippus1875 Orohippus1877 Eohippus1879 1879 J. Le Conte Elements Geol. (new ed.) 504 Eohippus..a small animal no bigger than a fox, having three toes on the hind foot and four perfect ones on the fore foot. 1880 T. H. Huxley in Times 25 Dec. 4/1 I do not see..any reason to doubt that the eocene equidæ were preceded by mesozoic forms, which differed from eohippus in the same way as eohippus differs from equus. Categories » Eopteris n. Brit. /ɪˈɒpt(ə)rɪs/ , U.S. /iˈɑpt(ə)rəs/ [+ Greek πτερίς fern] a genus including the oldest known fern. Eosaurus n. Brit. /ˌiːə(ʊ)ˈsɔːrəs/ , U.S. /ˌiəˈsɔrəs/ , /ˌioʊˈsɔrəs/ the oldest known genus of saurians. ΚΠ 1879 J. Le Conte Elements Geol. (new ed.) 404 Unless we except the Eosaurus, these are the first true reptiles found. Eozoon n. Brit. /ˌiːə(ʊ)ˈzəʊən/ , /ˌiːə(ʊ)ˈzəʊɒn/ , U.S. /ˌiəˈzoʊˌɑn/ , /ˌioʊˈzoʊˌɑn/ [+ Greek ζῷον animal] a supposed genus of foraminifers or rhizopods, at one time regarded as the earliest known animal; its alleged remains are now believed to be of inorganic origin. ΚΠ 1866 C. Darwin Origin of Species (ed. 4) ix. 371 Within the last year the great discovery of the Eozoon in the Laurentian formation of Canada has been made. Eoˈzoonal adj. Brit. /ˌiːə(ʊ)ˈzəʊənl/ , U.S. /ˌiəˈzoʊən(ə)l/ , /ˌioʊˈzoʊən(ə)l/ pertaining to the eozoon. ΚΠ 1879 J. Le Conte Elements Geol. (new ed.) 275 A section of an Eozoönal mass. 1881 R. Etheridge in Jrnl. Geol. Soc. 38 54 The prevalent limestones, Eozoonal or otherwise. This entry has not yet been fully updated (first published 1891; most recently modified version published online March 2022). < comb. form1866
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