- stelar theory
- noun
: a theory in botany: stem and root are fundamentally alike anatomically since in both the cortex surrounds a central stele
Useful english dictionary. 2012.
Useful english dictionary. 2012.
Xylem — Multiple cross sections of a flowering plant stem showing primary and secondary xylem and phloem[1] Xylem is one of the two types of transport tissue in vascular plants. (Phloem is the other). The word xylem is derived from the Classical Greek… … Wikipedia
fern — fernless, adj. fernlike, adj. /ferrn/, n. any seedless, nonflowering vascular plant of the class Filicinae, of tropical to temperate regions, characterized by true roots produced from a rhizome, triangular fronds that uncoil upward and have a… … Universalium
Fern — /ferrn/, n. a female given name. * * * Any of about 10,000–12,000 species (division Filicophyta) of nonflowering vascular plants that have true roots, stems, and complex leaves and reproduce by spores. Though ferns were once classified with the… … Universalium
Relaxation (NMR) — Unter Relaxation versteht man in der Kernspinresonanzspektroskopie (NMR Spektroskopie) und Magnetresonanztomographie (MRT) die Vorgänge, die die Kernspin Magnetisierung (z. B. nach einer Auslenkung oder Anregung) in ihren… … Deutsch Wikipedia