† orthotropaladj.

Origin: Probably a borrowing from French, combined with an English element. Etymons: French orthotrope , -al suffix¹.

Etymology: Probably < French orthotrope (see orthotropous adj.) + -al suffix¹. Compare earlier orthotropous adj. Compare also heterotropal adj., and earlier peritropal adj. N.E.D. (1903) gives the pronunciation as (ǫɹþǫ·trŏpăl) /ɔːˈθɒtrəpəl/.

Botany. Obsolete.

= orthotropous adj. 1.

ΘΚΠ

the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [adjective] > ovum > types of ovum

orthotropal1832

meroblastic1864

periblastic1876

holoblastic1879

orthotropous1880

telolecithal1880

progamous1885

teleplasmic1886

triovulate1891

1832 J. Lindley Introd. Bot. 415 Orthotropal [embryo of the seed],..straight, and having the same direction as the body to which it belongs.

1849 J. H. Balfour Man. Bot. §584 The hilum and chalaza may correspond, the micropyle being at the opposite extremity, and then the seed is orthotropal.

1882 Standard 9 Oct. 5/3 Orthotropal ovules, and loculicidal dehiscence were the commonplaces of his conversation.

1897 Science 14 May 775/2 All the Pacific Dicyemidae observed have orthotropal calottes.

This entry has been updated (OED Third Edition, September 2004; most recently modified version published online December 2019).

单词	orthotropal
释义	† orthotropaladj. Origin: Probably a borrowing from French, combined with an English element. Etymons: French orthotrope , -al suffix¹. Etymology: Probably < French orthotrope (see orthotropous adj.) + -al suffix¹. Compare earlier orthotropous adj. Compare also heterotropal adj., and earlier peritropal adj. N.E.D. (1903) gives the pronunciation as (ǫɹþǫ·trŏpăl) /ɔːˈθɒtrəpəl/. Botany. Obsolete. = orthotropous adj. 1. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [adjective] > ovum > types of ovum orthotropal1832 meroblastic1864 periblastic1876 holoblastic1879 orthotropous1880 telolecithal1880 progamous1885 teleplasmic1886 triovulate1891 1832 J. Lindley Introd. Bot. 415 Orthotropal [embryo of the seed],..straight, and having the same direction as the body to which it belongs. 1849 J. H. Balfour Man. Bot. §584 The hilum and chalaza may correspond, the micropyle being at the opposite extremity, and then the seed is orthotropal. 1882 Standard 9 Oct. 5/3 Orthotropal ovules, and loculicidal dehiscence were the commonplaces of his conversation. 1897 Science 14 May 775/2 All the Pacific Dicyemidae observed have orthotropal calottes. This entry has been updated (OED Third Edition, September 2004; most recently modified version published online December 2019). < adj.1832
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