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alliance the act of allying or condition of being allied. [3 definitions]
allied related or similar in nature. [3 definitions]
Allies in World War I, the alliance of France, Great Britain, Russia, and other nations against the Central Powers. [2 definitions]
alligator either of two large crocodilian reptiles found in China and the southeastern United States and distinguished by their short broad snouts.
alligator flag any of a family of large, broad-leafed, tropical, aquatic plants that usually grow up to six feet tall and have heavy blooms of delicate blue and purple flowers.
alligator pear an avocado.
all-important extremely important; absolutely necessary; indispensable.
all in all with every factor taken into account; in general.
alliterate to display or use alliteration. [2 definitions]
alliteration repetition of the same consonant sound in the stressed or initial syllables of words in a phrase or sentence.
all-nighter a night spent without sleeping, esp. in order to work on something.
allo- other; different; variation.
allocate to assign or set aside (money or other resources) for some specific use. [2 definitions]
all of a sudden suddenly; without warning.
allogamy the technique or process of cross-fertilization in plants.
allomerism change in chemical composition without accompanying change in crystalline form.
allomorph any of several alternate structural forms of the same chemical compound; paramorph. [2 definitions]
allopath one who favors or practices allopathy.
allopathy treatment of disease with agents intended to produce effects that are different from those of the disease. (Cf. homeopathy.)
allophone in phonetics, any of the variants of a phoneme.
allosaurus any of various large meat-eating dinosaurs of the Jurassic and Cretaceous periods.