key

metal device shaped in such a way that when it is inserted into the appropriate lock the lock's mechanism can be rotated something crucial for explaining

"the key to development is economic integration"

pitch of the voice

"he spoke in a low key"

any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music

同义词：tonality

a kilogram of a narcotic drug

"they were carrying two keys of heroin"

a winged often one-seed indehiscent fruit as of the ash or elm or maple

同义词：samarakey fruit

United States lawyer and poet who wrote a poem after witnessing the British attack on Baltimore during the War of 1812; the poem was later set to music and entitled `The Star-Spangled Banner' (1779-1843)

同义词：Francis Scott Key

a coral reef off the southern coast of Florida

同义词：cayFlorida key

(basketball) a space (including the foul line) in front of the basket at each end of a basketball court; usually painted a different color from the rest of the court

"he hit a jump shot from the top of the key"

同义词：paint

a list of answers to a test

"some students had stolen the key to the final exam"

a list of words or phrases that explain symbols or abbreviations a generic term for any device whose possession entitles the holder to a means of access

"a safe-deposit box usually requires two keys to open it"

mechanical device used to wind another device that is driven by a spring (as a clock)

同义词：winder

the central building block at the top of an arch or vault

同义词：keystoneheadstone

a lever that actuates a mechanism when depressed v.
identify as in botany or biology, for example

同义词：identifydiscoverkey outdistinguishdescribename

provide with a key

"We were keyed after the locks were changed in the building"

vandalize a car by scratching the sides with a key

"His new Mercedes was keyed last night in the parking lot"

regulate the musical pitch of harmonize with or adjust to

"key one's actions to the voters' prevailing attitude"

adj.
serving as an essential component

同义词：cardinalcentralfundamentalprimal

effective; producing a desired effect

同义词：operative