backward-compatible
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Related to backward-compatible: Downward compatibility
back·ward-com·pat·i·ble
(băk′wərd-kəm-păt′ə-bəl)adj.
Compatible with earlier systems or elements of earlier systems: a new release of an operating system that is backward-compatible with earlier versions.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.