[en-duh-spurm] /ˈɛn dəˌspɜrm/
nutritive matter in seed-plant ovules, derived from the embryo sac.
the tissue within the seed of a flowering plant that surrounds and nourishes the developing embryo
1819, perhaps from German, from endo- + sperm.
The tissue that surrounds and provides nourishment to the embryo in the seeds of many angiosperms. The cells of the endosperm arise from a process similar to that of fertilization. The pollen of angiosperms contains two sperm, one of which fertilizes the egg cell in the female gametophyte. The second unites with two other nuclei in the female gametophyte, producing cells that are triploid (having three sets of chromosomes) and that develop into the endosperm. In some species of angiosperms, the endosperm is absorbed by the embryo before germination, while in others it is consumed during germination. Embyros that lack an endosperm (such as peas and beans) have absorbed most of their food storage tissues before becoming dormant and develop large, fleshy cotyledons.
[en-duh-spawr, -spohr] /ˈɛn dəˌspɔr, -ˌspoʊr/ noun 1. Botany, Mycology. the inner coat of a . Compare . 2. Bacteriology. a formed within a cell of a rod-shaped organism. /ˈɛndəʊˌspɔː/ noun 1. a small asexual spore produced by some bacteria and algae 2. the innermost wall of a spore or pollen grain n. 1859, perhaps from […]
[en-duh-spawr-ee-uh m, -spohr-] /ˌɛn dəˈspɔr i əm, -ˈspoʊr-/ noun, plural endosporia [en-duh-spawr-ee-uh, -spohr-] /ˌɛn dəˈspɔr i ə, -ˈspoʊr-/ (Show IPA). Botany, Mycology. 1. . endosporium (ěn’də-spôr’ē-əm) Plural endosporia See endospore.
[en-doh-stat-n] /ˌɛn doʊˈstæt n/ noun, Biochemistry. 1. a naturally occurring protein, collagen 18, that interferes with the growth of new blood vessels: investigated for use as an anticancer drug.
endosteitis en·dos·te·i·tis (ěn’dŏ-stē-ī’tĭs) or en·dos·ti·tis (ěn’dŏ-stī’tĭs) n. Inflammation of the endosteum or of the medullary cavity of a bone. Also called central osteitis, perimyelitis.
endosteoma en·dos·te·o·ma (ěn’dŏ-stē-ō’mə) or en·dos·to·ma (ěn’dŏ-stō’mə) n. A benign tumor of bone tissue in the medullary cavity of a bone.