tretinoin (usually uncountable, plural tretinoins)
(organic compound, pharmaceutical drug) The acid form of vitamin A, commonly used to treat acne vulgaris and keratosis pilaris.
• all-trans retinoic acid
• ATRA
• tontinier
Source: Wiktionary
12 June 2025
(noun) a decrease in the density of something; “a sound wave causes periodic rarefactions in its medium”
International Coffee Day (September 29) is an occasion to promote and celebrate coffee as a beverage, with events occurring in places across the world. A day to promote fair trade coffee and raise awareness for the coffee growers’ plight. Other countries celebrate this event on October 1.
