forms (stem

См. также в других словарях:

• stem — I UK [stem] / US noun [countable] Word forms stem : singular stem plural stems ** 1) the long thin central part of a plant from which the leaves and flowers grow Cut the stems to ground level in winter. 2) the long thin part of a wine glass that… …   English dictionary

• stem turn — noun a turn made in skiing; the back of one ski is forced outward and the other ski is brought parallel to it • Syn: ↑stem • Derivationally related forms: ↑stem (for: ↑stem) • Hypernyms: ↑turn, ↑ …   Useful english dictionary

• stem cell — UK / US noun [countable, usually plural] Word forms stem cell : singular stem cell plural stem cells science a cell that is taken from a person or animal at an early stage of development and is capable of developing into cells of any type, for… …   English dictionary

• stem from — phrasal verb [transitive] Word forms stem from : present tense I/you/we/they stem from he/she/it stems from present participle stemming from past tense stemmed from past participle stemmed from stem from something to be caused by something His… …   English dictionary

• Stem cell research policy — Stem cell research policy, a controversial topic, varies significantly throughout the world. There are overlapping jurisdictions of international organizations, nations, and states or provinces. Some government policies determine what is allowed… …   Wikipedia

• Stem cell factor — (SCF), otherwise known as KIT ligand or Steel factorFreshney, Ian R. Culture of Animal Cells: A manual of basic technique . John Wiley Sons, Inc., Hoboken, New Jersey. ISBN 13 978 0 471 45329 1] ,is a cytokine which binds CD117 (c Kit). SCF is… …   Wikipedia

• Stem-loop — intramolecular base pairing is a pattern that can occur in single stranded DNA or, more commonly, in RNA. The structure is also known as a hairpin or hairpin loop. It occurs when two regions of the same molecule, usually palindromic (reads the… …   Wikipedia

• stem — stem1 stemless, adj. stemlike, adj. /stem/, n., v., stemmed, stemming. n. 1. the ascending axis of a plant, whether above or below ground, which ordinarily grows in an opposite direction to the root or descending axis. 2. the stalk that supports… …   Universalium

• stem cell — Cell Biol. a cell that upon division replaces its own numbers and also gives rise to cells that differentiate further into one or more specialized types, as various B cells and T cells. [1880 85] * * * ▪ biology Introduction  an undifferentiated… …   Universalium

• Stem rust — Puccinia graminis Scientific classification Kingdom: Fungi Phylum …   Wikipedia

• Stem cell controversy — The stem cell controversy is the ethical debate primarily concerning the creation, treatment, and destruction of human embryos incident to research involving embryonic stem cells. Not all stem cell research involves the creation, use, or… …   Wikipedia