a modified leaf that bears sporangia.
a leaf in ferns and other spore-bearing plants that bears the sporangia See also megasporophyll, microsporophyll
A leaf or leaflike organ that bears sporangia.
noun, Botany. 1. the form of a plant in the alternation of generations that produces asexual spores. noun 1. the diploid form of plants that have alternation of generations. It develops from a zygote and produces asexual spores Compare gametophyte sporophyte (spôr’ə-fīt’) Among organisms which display an alternation of generations (such as plants, fungi, and […]
- 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.