when

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1-20 of 20 possibilities

Definition/MeaningWord/Phrase
mathematical element that when added to another number yields the same number 0 , cipher , cypher , nought , zero
terrorist organization formed in 1979 by a faction of the Popular Front for the Liberation of Palestine but disbanded in the 1980s when key members left to join a faction of al-Fatah 15 May Organization
day in 2001 when Arab suicide bombers hijacked United States airliners and used them as bombs 9-11 , 9/11 , Sep 11 , Sept. 11 , September 11
medium to tall fir of western North America having a conic crown and branches in tiers; leaves smell of orange when crushed Abies amabilis , amabilis fir , Christmas tree , Pacific silver fir , red silver fir , white fir
medium-sized fir of northeastern North America; leaves smell of balsam when crushed; much used for pulpwood and Christmas trees Abies balsamea , balm of Gilead , balsam fir , Canada balsam
dark-skinned member of a race of people living in Australia when Europeans arrived Abo , Aboriginal , Aborigine , Australian Aborigine , native Australian
condition in which the upper teeth do not touch the lower teeth when biting abocclusion
abortion-inducing drug (trade name RU_486) developed in France; when taken during the first five weeks of pregnancy it blocks the action of progesterone so that the uterus sloughs off the embryo abortion pill , mifepristone , RU 486
human fetus whose weight is less than 0.5 kilogram when removed or expelled from the mother's body abortus
power unit equal to the power dissipated when 1 abampere flows across a potential difference of 1 abvolt (one ten-thousandth of a milliwatt) abwatt
period of time each year when the school is open and people are studying academic year , school year
person (or institution) who accepts a check or draft and becomes responsible for paying the party named in the draft when it matures acceptor
quality of being at hand when needed accessibility , availability , availableness , handiness
(law) an increase in a beneficiary's share in an estate (as when a co-beneficiary dies or fails to meet some condition or rejects the inheritance) accretion
method of accounting in which each item is entered as it is earned or incurred regardless of when actual payments are received or made accrual basis
maple of the Pacific coast of the United States; fruits are white when mature Acer negundo Californicum , California box elder
any of three liquid acetates that are formed when acetic acid and glycerin are heated together acetin
Eurasian herb having loose heads of button-shaped white flowers and long grey-green leaves that cause sneezing when powdered Achillea ptarmica , sneezeweed yarrow , sneezewort
mythical Greek hero of the Iliad; a foremost Greek warrior at the siege of Troy; when he was a baby his mother tried to make him immortal by bathing him in a magical river but the heel by which she held him remained vulnerable--his `Achilles' heel' Achilles
hydrogen atom in an acid that forms a positive ion when the acid dissociates acid hydrogen , acidic hydrogen
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