orthotropous

American  

[awr-tho-truh-puhs] / ɔrˈθɒ trə pəs /

adjective

1. Botany. (of an ovule) straight and symmetrical, with the chalaza at the evident base and the micropyle at the opposite extremity.

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orthotropous British  

/ ɔːˈθɒtrəpəs /

adjective

1. (of a plant ovule) growing straight during development so that the micropyle is at the apex Compare anatropous

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Etymology

Origin of orthotropous

From the New Latin word orthotropus, dating back to 1820–30. See ortho-, -tropous

Example Sentences

Fruit a kind of dry drupe, with a crustaceous or bony nut-shell, containing a large 4-lobed orthotropous seed.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

Ovules very numerous, scattered over the walls, orthotropous.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

Ovary 2–3-celled, with several pendulous orthotropous ovules in each cell; stigma minute.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

Fertile flowers consisting each of a 1-celled ovary, tipped with a depressed stigma, and containing 5 or 6 orthotropous ovules erect from the base of the cell; in fruit a 1–few-seeded scarlet berry.

From The Manual of the Botany of the Northern United States Including the District East of the Mississippi and North of North Carolina and Tennessee by Gray, Asa

Having the ovule inverted at an early period in its development, so that the chalaza is as the apparent apex; Ð opposed to orthotropous.

From Webster's Unabridged Dictionary by Webster, Noah