Freebase(0.00 / 0 votes)Rate this definition: Thistle. Thistle is the common name of a group of flowering plants characterised by leaves with sharp prickles on the margins, mostly in the family Asteraceae. Prickles often occur all over the plant â on surfaces such as those of the stem and flat parts of leaves.
Men's Health. Shock treatment may improve erectile dysfunction. An experimental therapy known as low-intensity shock wave treatment might improve erectile dysfunction, particularly for men with only mild to moderate sexual difficulties, a research review suggests.
Erectile Dysfunction. Erectile dysfunction (ED) is the inability of a man to attain and/or maintain an erection sufficient for sexual activity. The process leading to an erection is a complex interaction between physical and psychological factors. There have been great advances over the past twenty or so years in the diagnosis and treatment of erectile dysfunction. 1  Estimated 30 million men in the United States including over half of men between the age of 40 and 70 years old are affected by ED to some degree. 2  Erectile dysfunction is not normal at any age.