stem


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stem

 [stem]
a stalklike supporting structure; see also peduncle.
brain stem brainstem.

stem

(stem),
A supporting structure similar to the stalk of a plant.

stem

(stem) a supporting structure comparable to the stalk of a plant.
brain stem  brainstem; see under B.

STEM

abbr.
science, technology, engineering, and mathematics

stem

(stĕm)
n.
A supporting structure resembling the stalk of a plant.

stem

(stĕm)
v. stemmed, stemming, stems
v.tr.
1. To stop or stanch (a flow): stemmed the bleeding.
2. To restrain or stop: wanted to stem the growth of government.
3. To plug or tamp (a blast hole, for example).
4. Sports To turn (a ski, usually the uphill ski) by moving the heel outward.
v.intr. Sports
To stem a ski or both skis, as in making a turn.

stem

A term of art used in clinical trials for a prompt, question or instruction in a patient-reported outcome item.

stem

(stem)
A supporting structure similar to the stalk of a plant.
Fig. 289 Stem. Transverse sections of herbaceous stems; (a) dicotyledon, (b) monocotyledon.click for a larger image
Fig. 289 Stem . Transverse sections of herbaceous stems; (a) dicotyledon, (b) monocotyledon.

stem

the part of the shoot of vascular plants from which are produced leaves at regular intervals (NODES) and reproductive structures. Stems are usually circular in cross section but some are square (for example, members of the family Labiatae, such as mint and lavender) while others are ribbed. The internal structure of stems can be herbaceous (non-woody) or show SECONDARY THICKENING. See Fig. 289 .

The forms adopted by stems are highly varied, ranging from the oak tree to climbing plants such as Clematis and the pea. Stems are sometimes used as underground storage organs as in RHIZOMES, CORMS, BULBS (underground shoots with food stored in fleshy leaves) and stem TUBERS, e.g. potato, while others, such as the strawberry RUNNER and suckers of mint, are adapted for VEGETATIVE PROPAGATION.

stem

stalk; a stalklike supporting structure.

brain stem

Patient discussion about stem

Q. my mother have stem replacement for a coronary artery oclusion is already 2 years she physically deteriorating since surgery why???? please help she does not have energy

A. I agree with Dagmar. It can be most likely caused by another occlusion or re-occlusion inside the heart blood vessels. Since that is a life-threatening case, I strongly suggest you to bring your mother into a hospital (for complete check up), or just call your cardiologist to have first treatment.

Meanwhile, that will be better if you have emergency oxygen (just in case you'll need it) with you.

More discussions about stem
References in periodicals archive ?
The primary aim of this study is to evaluate the safety of adipose-derived stem and regenerative cells, extracted and concentrated by our Celution(TM) System at the patient's bedside in a single surgical procedure," said Marc H.
But research using embryonic stem cells particularly has generated controversy because it would require the destruction of a human embryo and/or therapeutic cloning.
However, the researchers quickly noticed a distinction when they subjected stem cells to the stress of bone marrow transplants.
Research on adult stem cells--which can be obtained without the destruction of innocent human life--has already yielded results that embryonic stem-cell proponents can only dream of achieving.
Recently, a mammary carcinoma stem cell has been isolated from primary mammary carcinomas using four cell surface markers (CD44; CD24; a mammary tumor marker, and epithelial specific antigen).
Although embryonic stem cells, or ES cells, hold the greatest potential for medical research, they also awaken the greatest fears about the direction of medical research.
A stem cell is a unique type of cell that has the ability to renew itself over long periods of time.
Example: Scientist Don Wolf of the Oregon National Primate Center is working with stem cell lines to develop a treatment for human diabetes, a disease in which cells in the pancreas can no longer regulate blood sugar levels.
Upon closer inspection, the number of viable stem cell lines turns out to be fewer than a dozen.
What are stem cells exactly, and why do many people find their use morally troubling?
Canada has no regulation regarding cloning or any other reproductive technology, but the government is forming a committee to advise it on stem cell policy.