gymnosperm

الإنجليزية - التركية

تعريف gymnosperm في الإنجليزية التركية القاموس.

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الإنجليزية - الإنجليزية

تعريف gymnosperm في الإنجليزية الإنجليزية القاموس.

Any plant such as a conifer whose seeds are not enclosed in an ovary

{i} plants whose seeds are exposed (Botany)

plants of the class Gymnospermae having seeds not enclosed in an ovary

A seed plant which bears naked seeds, without an ovary These plants of ancient lineage include the conifers so characteristic of the North Country as well as the gingko and ephedra of warmer climes From the Greek, gumnos (gymnos), "naked "

A plant whose seeds are not enclosed in flowers Most gymnosperms produce their seeds on the surface of the scales of female cones and are pollinated by wind Conifers are the most common type of gymnosperm

Angiosperm

Generally any seed plant which does not produce flowers The term may or may not exclude the pteridosperms

A type of plant that bears seeds not enclosed by any type of specialized structure Conifers are examples of gymnosperms

Any woody plant that reproduces by means of a seed (or ovule) in direct contact with the environment, as opposed to an angiosperm, or flowering plant, whose seeds are enclosed by mature ovaries, or fruits. The four surviving gymnosperm divisions are Coniferophyta (conifers, the most widespread), Cycadophyta (cycads), Ginkgophyta (ginkgos), and Gnetophyta. More than half are trees; most of the rest are shrubs. Gymnosperms occur on all continents except Antarctica, and especially in the temperate latitudes. Those widely found in the Northern Hemisphere are junipers, firs, larches, spruces, and pines; in the Southern Hemisphere, podocarps (Podocarpus). The wood of gymnosperms is often called softwood to differentiate it from the hardwood of angiosperms. Many timber and pulp trees are also planted as ornamentals. Gymnosperms also are a minor source of food; of essential oils used in soaps, air fresheners, disinfectants, pharmaceuticals, cosmetics, and perfumes; of tannin, used for curing leather; and of turpentines. Gymnosperms were a major component in the vegetation that was compressed over millions of years into coal. Most are evergreen. They produce male and female reproductive cells in separate male and female strobili (see cone)

seeds not inclosed in an ovary, as the common pine and hemlock

A plant whose seeds do not develop within an ovary Naked seeds, i e a pine tree

A vascular plant that bears naked seeds not enclosed in any specialized chambers

Cf

A plant that bears naked seeds i

Plant that bears naked seeds Representatives of this group include the conifers

large class of plants having seeds without an ovary, usually on scales of a cone; includes conifers and the ginkgo

Pertaining to the gymnosperms

المصطلحات ذات الصلة

gymnosperm family

a family of gymnosperms

gymnosperm genus

a genus of gymnosperms

gymnosperms

plants with naked seeds borne on cone

gymnosperms

Plants having uncovered ("naked") seed Ex , pines, spruces, firs, and other conifers

gymnosperms

a class of plants that produce seeds that have no outer covering; mostly conifers

gymnosperms

A group of seed plants, whose seeds are not enclosed in an ovary. The most important group of gymnosperms (Gymnospermae) are the conifers (Coniferae or Coniferales)

الواصلة

gym·no·sperm

علم أصول الكلمات

[ 'jim-n&-"sp&rm ] (noun.) circa 1838. ultimately from Greek gymnos + sperma seed; more at SPERM.