h.d.

¹

abbreviation for

1. (in prescriptions) at bedtime.

h.d.

²

abbreviation for

1. heavy duty.

HD

³

abbreviation for

1. high-definition; high definition:

   channels that broadcast in HD;

   HD video;

   HD DVDs;

   an HD display on my new tablet.

2. Computers. high definition ( def ).
3. Huntington's disease ( def ).

hd.

⁴

abbreviation for

1. hand.
2. head.

hd

abbreviation for

1. hand
2. head

Word History and Origins

Origin of h.d.¹

From New Latin hōra dēcubitūs