In chemistry, a glycoside (pronounced /ˈɡlaɪkəsaɪd/) is a molecule in which a sugar is bound to a non-carbohydrate moiety, usually a small organic molecule. Glycosides play numerous important roles in living organisms. Many plants store chemicals in the form of inactive glycosides. These can be activated by enzyme hydrolysis, which causes the sugar part to be broken off, making the chemical available for use. Many such plant glycosides are used as medications. In animals and humans, poisons are often bound to sugar molecules as part of their elimination from the body.

In formal terms, a glycoside is any molecule in which a sugar group is bonded through its anomeric carbon to another group via a glycosidic bond. Glycosides can be linked by an O- (an O-glycoside), N- (a glycosylamine), S-(a thioglycoside), or C- (a C-glycoside) glycosidic bond. The given definition is the one used by IUPAC, which recommends the Haworth projection to correctly assign stereochemical configurations. Many authors require in addition that the sugar be bonded to a non-sugar for the molecule to qualify as a glycoside, thus excluding polysaccharides. The sugar group is then known as the glycone and the non-sugar group as the aglycone or genin part of the glycoside. The glycone can consist of a single sugar group (monosaccharide) or several sugar groups (oligosaccharide).

David Warren "Dave" Brubeck (born December 6, 1920) is an American jazz pianist. He has written a number of jazz standards, including "In Your Own Sweet Way" and "The Duke". Brubeck's style ranges from refined to bombastic, reflecting his mother's attempts at classical training and his improvisational skills. His music is known for employing unusual time signatures, and superimposing contrasting rhythms, meters, and tonalities.

His long-time musical partner, alto saxophonist Paul Desmond, wrote the Dave Brubeck Quartet's best remembered piece, "Take Five", which is in 5/4 time and has endured as a jazz classic on the top-selling jazz album, Time Out. Brubeck experimented with time signatures throughout his career, recording "Pick Up Sticks" in 6/4, "Unsquare Dance" in 7/4, and "Blue Rondo à la Turk" in 9/8. He is also a respected composer of orchestral and sacred music, and wrote soundtracks for television such as Mr. Broadway and the animated mini-series This Is America, Charlie Brown.

Brubeck was born in Concord, California and grew up in Ione. He is of English (maternal), Swiss and possibly Native American Modoc Tribe multi-ethnic (paternal) ancestry His father, Howard "Pete" Brubeck, was a cattle rancher, and his mother, Elizabeth (née Ivey), who had studied piano in England under Myra Hess and intended to become a concert pianist, taught piano for extra money. Brubeck originally did not intend to become a musician (his two older brothers, Henry and Howard, were already on that track), but took lessons from his mother. He could not read sheet music during these early lessons, attributing this difficulty to poor eyesight, but "faked" his way through, well enough that this deficiency went mostly unnoticed.