free central placentation

noun
where ovules develop on a central column in a compound ovary lacking septa or with septa at base only
Hypernyms: ↑placentation

Useful english dictionary. 2012.

Look at other dictionaries:

  • free central placentation — n. Bot. a type of placenta structure in an ovary, in which the ovules cluster freely around a columnlike central placenta which is attached at the base of the ovary: cf. AXILE PLACENTATION, PARIETAL (sense 3) * * * …   Universalium

  • free central placentation — n. Bot. a type of placenta structure in an ovary, in which the ovules cluster freely around a columnlike central placenta which is attached at the base of the ovary: cf. AXILE PLACENTATION, PARIETAL (sense 3) …   English World dictionary

  • placentation — noun 1. the formation of the placenta in the uterus • Hypernyms: ↑bodily process, ↑body process, ↑bodily function, ↑activity 2. arrangement of the ovules in the placenta and of the placentas in the ovary • Hypernyms: ↑reproductive structure …   Useful english dictionary

  • Placentation — In biology, placentation refers to the formation, type and structure, or arrangement of placentas. The function of placentation is to transfers nutrients from maternal tissue to a growing embryo. Placentation is best known in pregnant female… …   Wikipedia

  • freecentral placentation — free central placentation n. Botany The arrangement of ovules on a central column that is not connected to the ovary wall by partitions, as in the ovaries of the carnation and primrose. * * * …   Universalium

  • angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium

  • Lamiales — ▪ plant order Introduction   mint order of flowering plants, including 23 families and more than 23,000 species. The main families in the order are Lamiaceae, Verbenaceae, Plantaginaceae, Scrophulariaceae, Orobanachaceae, Acanthaceae,… …   Universalium

  • reproductive system, plant — Introduction       any of the systems, sexual or asexual, by which plants reproduce. In plants, as in animals, the end result of reproduction is the continuation of a given species, and the ability to reproduce is, therefore, rather conservative …   Universalium

  • Caryophyllidae — n. a group of families of mostly flowers having basal or free central placentation and trinucleate pollen (binucleate pollen is commoner in flowering plants); it contains 14 families including: {Caryophyllaceae} (carnations and pinks);… …   The Collaborative International Dictionary of English

  • Centrospermae — is a descriptive botanical name, published in 1878 by Eichler, meaning with the seed in the center , referring to the free central placentation. It was used in the Engler system and the Wettstein system) for an order of flowering plants. In its… …   Wikipedia

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