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alphanumeric
alphatocopherol
alphavirus
alphonso
alphorn
Alpine
alpine
alpine start
alpine-style
alpinist
Alport’s syndrome
alprostadil
Alps
already
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alpha source
al·pha source (plural al·pha sources)


noun 
Definition:
 
source of alpha particle: a radioactive atom that emits alpha particles, e.g. polonium
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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