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

Chalaza, the place where the seed-coats and the kernel or nucleus are organically connected,—at the hilum in orthotropous and campylotropous seeds, at the extremity of the rhaphe or tip of the seed in other kinds.

From The Elements of Botany For Beginners and For Schools by Gray, Asa

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

The whole flower may be looked upon as an adventitious bud bearing two pairs of leaves; each pair becomes concrescent and forms a perianth, the apex of the shoot being converted into an orthotropous ovule.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 7 "Gyantse" to "Hallel" by Various

Fruit a 3-celled berry, with 1–2 pendulous orthotropous seeds in each cell.

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