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heliometer
heliopause
heliophyte
Heliopolis
Helios
helioseismology
heliosphere
heliostat
heliotaxis
heliotherapy
heliotrope
heliotropism
heliozoan
helipad
heliport
heliskiing
helistop
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heliotaxis
he·li·o·tax·is [ hlee ə táksiss ]


noun 
Definition:
 
movement in response to sunlight: movement toward or away from sunlight in an organism that is able to move about freely

he·lio·tac·tic adjective
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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