persistent


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.
Related to persistent: Persistent cough

persistent

(pər-sĭs′tənt)
adj.
1. Existing or remaining in the same state for an indefinitely long time; enduring: persistent rumors; a persistent infection.
2. Botany Lasting past maturity without falling off, as the calyx on an eggplant or the scales of a pine cone.
3. Zoology Retained permanently, rather than disappearing in an early stage of development: the persistent gills of fishes.

per·sis′tent·ly adv.

persistent

relative to embryological defects refers to persistence of an entity into external life in such a way as to cause some reduction of efficiency. The common defects are listed under the names of the compromised organs. See also persistent right aortic arch, ductus arteriosus, penile preputial frenulum, imperforate hymen, persistent urachus, persistent hyperplastic vitreous, persistent pupillary membrane.

persistent corpus luteum
see corpus luteum.
persistent ductus arteriosus
see patent ductus arteriosus.
persistent ductus venosus
see ductus venosus.
persistent omphalomesenteric duct
persistent posterior perilenticular vascular tunic
the tunic is generated in the embryo but atrophies just before birth. Persistence of some part of the tunic into adult life is common but of no clinical significance.
persistent recumbency
the animal is normal in other respects but does not rise to its hooves for a period exceeding 24 hours.
persistent right aorta arch
see persistent right aortic arch.
persistent truncus arteriosus
may cause neonatal congestive heart failure and cyanosis; the interventricular septum is usually patent. See also truncus arteriosus.

Patient discussion about persistent

Q. Have you ever heard that vaccines cause autism? If so why such thought persist? Hi my new friends! Hope you are all in good health! Have you ever heard that vaccines cause autism? If so why such thought persist? I look forward to reading all of your answers tomorrow.

A. Yes I heard about that and avoided being injected sometimes. This belief persists because signs of autism may appear around the same time that children receive the vaccine that prevents measles, mumps and rubella, and some parents worry that the vaccine caused the autism.

Q. Can lung cancer be diagnosed on behalf of persistent cough? My father is a heavy smoker. He smoked for all his adult life and he never stopped. In the last few weeks he started to have persistent cough attacks. Can those attacks be the first sign of lung cancer?

A. Smoking can damage the lung in many ways. The fact that someone that is a smoker is suffering from chronic cough doesn't mean that he is suffering from lung cancer. To get a cretin diagnosis you will have to do a chest X-ray.
here is a X-ray with the lesion that might be an actual lung cancer
http://www.e-radiography.net/technique/chest/cxreval20.jpg

Q. Headache that won’t go away. Help! Hi, I’m 47 years old man, working as accountant. Yesterday afternoon, I came back home, and after some time I started to feel headache that still going. Is it dangerous? Is it possible I have something like bleeding? I wasn’t hit or injured in anyway in my head before this headache appeared

A. There are two types of headaches: primary headaches and secondary headaches. Primary headaches are not associated with (caused by) other diseases. Examples of primary headaches are migraine headaches, tension headaches, and cluster headaches. Secondary headaches are caused by associated disease. The associated disease may be minor or serious and life threatening. Tension headaches are the most common type of primary headache. Tension headaches are more common among women than men. Migraine headaches are the second most common type of primary headache. Secondary headaches have diverse causes, ranging from serious and life threatening conditions such as brain tumors, strokes, meningitis, and subarachnoid hemorrhages to less serious but common conditions such as withdrawal from caffeine and discontinuation of analgesics. http://www.medicinenet.com/headache/article.htm In any case if your headache continues you should see your doctor immediately. Hope this helps.

More discussions about persistent
References in classic literature ?
I'm persistent in wantin' to get up which ary side my larder is; don't you see, all on yer?
And how persistent, how insolent are your sallies, and at the same time what a scare you are in
He is much the best man and the most persistent wooer, of all those who are paying court to my mother and trying to take Ulysses' place.
Lately, he had as- sured himself that the altered comrade would not tantalize him with a persistent curiosity, but he felt certain that during the first period of leisure his friend would ask him to relate his adventures of the previous day.
It is a sort of steady, persistent, overwhelming, endlessly driving downpour, which makes your heart sick, and opens it to dismal forebodings.
His persistent demands would have ended, at Dan's instigation, in a regimental belting which in all probability would have killed him and cut off the supply of beer, had not he been sent on special duty some fifty miles away from the Cantonment to cool his heels in a mud fort and dismount obsolete artillery.
I tried hard to understand the meaning of this question: but the persistent humming of the bees confused me, and there was a drowsiness in the air that made every thought stop and go to sleep before it had got well thought out: so all I could say was "That must depend on the weight of the potato.
Astley will take the refusal as a personal affront to himself (for you know how persistent the English are?
Pursued with persistent inveteracy, I cut off my hair, I disguised myself as a woodman.
But at that time Bobby was reading yet another letter, - he had the most persistent correspondent of any man in camp, - and was even then about to write that the sickness had abated, and in another week at the outside would be gone.
Presently my ear caught the faint and regular pulsation of her heart, firm and quick, infinitely touching in its persistent mystery, disclosing itself into my very ear - and my felicity became complete.
Not that he will for an instant admit that his rival could be right, but he is less persistent in his incessant objections, and has sunk for the most part into an observant silence.