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interrogate
interrogation
interrogation point
interrogative
interrogatory
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interrupt
interrupted cadence
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interstellar medium
in·ter·stel·lar me·di·um


noun 
Definition:
 
matter between stars in galaxies: matter of various types existing in the space between stars in galaxies, especially spiral galaxies
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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