the form of a plant in the alternation of generations that produces asexual spores.
the diploid form of plants that have alternation of generations. It develops from a zygote and produces asexual spores Compare gametophyte
Among organisms which display an alternation of generations (such as plants, fungi, and certain algae), the individual diploid organism that produces spores. A sporophyte develops from an embryo resulting from the union of two gametes. Each of its cells has two sets of chromosomes, as opposed to the haploid gametophyte generation. See more at alternation of generations, gametophyte.
- Spongy degeneration
spongy degeneration n. A rare, inherited, fatal brain disease of infancy characterized by the widespread loss of myelin from nerve sheaths and the presence of round empty spaces in the brain, giving it a spongelike appearance, and resulting in progressive paralysis, blindness, and megalencephaly. Also called Canavan’s disease.
- Spongy bone
spongy bone n. Bone in which the spicules form a latticework, with interstices filled with embryonic connective tissue or bone marrow. Also called cancellous bone, spongy substance, trabecular bone. Any of the turbinate bones.
Sporothrix Spo·ro·thrix (spôr’ə-thrĭks’) n. A genus of dimorphic imperfect fungi, including the species S. schenckii, the causative agent of sporotrichosis.
[spawr-uh-tri-koh-sis, spohr-] /ˌspɔr ə trɪˈkoʊ sɪs, ˌspoʊr-/ noun, Pathology. 1. a widespread infectious disease marked by nodules or ulcers of the skin, chiefly affecting humans and domestic mammals and caused by the fungus Sporothrix schenckii. sporotrichosis spo·ro·tri·cho·sis (spôr’ō-trĭ-kō’sĭs) n. A chronic infectious disease of domestic mammals and humans characterized by nodules or ulcers in the […]