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acetabulum the cup-shaped socket of the hipbone into which the top of the thighbone fits. [1/2 definitions]
advised up-to-date, as on plans or developments; informed. [1/2 definitions]
au courant in the current (French); knowledgeable about current events or other matters of the moment; up-to-date.
cam in machinery, a noncircular disc or cylinder that, when rotated, imparts an up-and-down or start-and-stop motion to a connected part.
chalice the cup-shaped blossom of a flower. [1/2 definitions]
crinoid an echinoderm characterized by a cup-shaped body to which feathery, radiating arms are attached, such as the sea lily. [1/3 definitions]
jiggle a jerky up-and-down or back-and-forth movement. [1/2 definitions]
last word (informal) the newest, most up-to-date fashion, appliance, equipment, or the like; latest thing. [1/3 definitions]
new modern; up-to-date. [1/9 definitions]
pump1 to move with a rapid, repetitive back-and-forth or up-and-down motion. [2/12 definitions]
rapid eye movement the rapid back-and-forth and up-and-down movements of the eyes during the phases of sleep when dreaming occurs. (abbrev.:REM)
saber a dueling or fencing sword with a cup-shaped hand guard and a two-edged blade. [1/3 definitions]
seesaw any up-and-down or back-and-forth motion. [1/4 definitions]
streamline to alter so as to make simpler or more efficient, compact, or up-to-date. [1/4 definitions]
tulip a cultivated plant that grows from a bulb and bears large lance-shaped leaves and large brightly-colored, cup-shaped flowers. [1/2 definitions]
turkey trot a dance to ragtime music, popular in the early 1900s, characterized by a springy walk and up-and-down movements of the shoulders.