protembryon.

Brit.

/prəʊˈtɛmbrɪəʊ/, U.S.

/proʊˈtɛmbriˌoʊ/

Origin: Formed within English, by compounding. Etymons: proto- comb. form, embryo n.

Etymology: < proto- comb. form + embryo n. (see quot. 1887).

Biology. rare.

A. S. Hyatt's term for: an embryo at the earliest stage of development, from fertilization to the first differentiation of cells prior to blastulation.

ΚΠ

1887 A. S. Hyatt in Proc. Boston Soc. Nat. Hist. 23 397 The stages of holoblastic ova may be..classified as follows..(1) The ovum or Monoplast..; (2) the first stage of segmentation..; (3) the second stage of segmentation... We have proposed to classify these stages under the name of Protembryo.

1913 Amer. Naturalist 47 199 Of embryonic stages the protembryo is represented by the egg and segmentation stages.

Derivatives

† protembryonic adj. Obsolete rare Apparently only attested in dictionaries or glossaries.

ΚΠ

1890 Cent. Dict. Protembryonic, of or pertaining to a protembryo.

This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).

单词	protembryo
释义	protembryon. Brit. /prəʊˈtɛmbrɪəʊ/, U.S. /proʊˈtɛmbriˌoʊ/ Origin: Formed within English, by compounding. Etymons: proto- comb. form, embryo n. Etymology: < proto- comb. form + embryo n. (see quot. 1887). Biology. rare. A. S. Hyatt's term for: an embryo at the earliest stage of development, from fertilization to the first differentiation of cells prior to blastulation. ΚΠ 1887 A. S. Hyatt in Proc. Boston Soc. Nat. Hist. 23 397 The stages of holoblastic ova may be..classified as follows..(1) The ovum or Monoplast..; (2) the first stage of segmentation..; (3) the second stage of segmentation... We have proposed to classify these stages under the name of Protembryo. 1913 Amer. Naturalist 47 199 Of embryonic stages the protembryo is represented by the egg and segmentation stages. Derivatives † protembryonic adj. Obsolete rare Apparently only attested in dictionaries or glossaries. ΚΠ 1890 Cent. Dict. Protembryonic, of or pertaining to a protembryo. This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022). < n.1887
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