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h.d.1

1.
(in prescriptions) at bedtime.
Origin of h.d.1
From the New Latin word hōra dēcubitūs

h.d.2

1.
heavy duty.

Doolittle

[doo-lit-l] /ˈduˌlɪt l/
noun
1.
Hilda ("H.D") 1886–1961, U.S. poet.
2.
James Harold, 1896–1993, U.S. aviator and general.
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for h.d.

Doolittle

/ˈduːlɪtəl/
noun
1.
Hilda. known as H.D. 1886–1961, US imagist poet and novelist, living in Europe
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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h.d. in Medicine

h.d. abbr.
Latin hora decubitus (before sleep, at bedtime)

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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