HD

A prefix used to designate a star as listed in the Henry Draper Catalog.

HD

On drawings, abbr. for head.

HD

high density

HD

(1) See HD Radio and HD audio.

(2) (High Definition) HD often refers to a high-resolution digital TV (see HDTV). The HD designation is also used with many TV/video formats (see HD analog formats and HD formats).

(3) (Hard Disk, Hard Drive) For example, a 500GB HD is a 500 gigabyte hard disk. FD means floppy disk; now a distant memory. See hard disk, magnetic disk and floppy disk.

(4) (High Density) HD and DD (double density) were used in floppy disk designations. For example, 3.5" 1.44MB HD and 720KB DD or 5.25" 1.2MB HD and 360K DD. See floppy disk.

(5) (High Definition) A screen resolution of 1280 x 720 pixels. HD+ is 1480x720. See DTV, FHD, 720p and screen resolution.

HD and HD+ Screen Resolutions

In the Galaxy S7 smartphone (top) and S8 (bottom), the screen resolution can be reduced to save battery.

See HD

HD

Acronym	Definition
HD➣High Definition
HD➣Hard Drive
HD➣Harley-Davidson
HD➣Heavy Duty
HD➣High Density
HD➣Human Developement (course of study)
HD➣Hard Disk
HD➣Home Depot, Inc. (NYSE symbol)
HD➣Head
HD➣Hybrid Digital (radio technology)
HD➣Hold
HD➣Hyundai
HD➣Honda
HD➣Happy Days (TV show)
HD➣Henry Draper (star catalog)
HD➣Hilary Duff
HD➣Hundred
HD➣Huntington's Disease
HD➣Hot Dog
HD➣Heidelberg
HD➣Home Decor
HD➣Help Desk
HD➣Home Defense
HD➣Heart Disease
HD➣Home Delivery
HD➣Harmonic Distortion
HD➣Högsta Domstolen (Swedish supreme court of justice)
HD➣Higher Diploma
HD➣Half Day
HD➣Half-Duplex
HD➣Historic District
HD➣Hairdresser
HD➣Hot Date (The Sims expansion pack)
HD➣Huddersfield (postcode, United Kingdom)
HD➣High Distortion
HD➣Homeland Defense
HD➣Hemodialysis
HD➣Hazardous Drug
HD➣Hodgkin's Disease
HD➣Helper-Dependent (genes)
HD➣Hip Dysplasia
HD➣Hydrodynamic
HD➣Mustard Gas
HD➣Hemorrhagic Disease
HD➣Helsingborgs Dagblad (Swedish newspaper)
HD➣High Dive
HD➣Hit Dice (role-playing games)
HD➣Hall Director
HD➣Health Division
HD➣Hand Dryer (building services)
HD➣Honorary Degree
HD➣Hemodynamically (stable)
HD➣Honorable Discharge
HD➣Highway Department
HD➣Hoe Down (party)
HD➣High Distinction (grade)
HD➣Hyperactive Disorder
HD➣Housing Department
HD➣Horizontal Distance
HD➣High Dispersion
HD➣Hazel Dell ( town in SW Washington)
HD➣Human Dimension
HD➣Helm's Deep (JRR Tolkien's The Two Towers)
HD➣Heaven's Disciples (Christian urban music)
HD➣House Document (USACE)
HD➣Humanitarian Demining (US Government unexploded ordnance mission areas)
HD➣Hüsker Dü (band)
HD➣Heat Detector
HD➣Homeopathic Doctor
HD➣Hydatid Disease
HD➣Hot Desk
HD➣Harbor Defense
HD➣Highly Dispersed
HD➣High-Drag
HD➣Heavy Drop
HD➣Hidden Desire
HD➣Hip-Disarticulation (amputation)
HD➣Hurricane Days
HD➣Harmonization Document
HD➣Hexanedione
HD➣Heavy Defense (gaming)
HD➣Hardware Disease (traumatic reticulopericarditis caused by foreign bodies in cattle)
HD➣Hrvatski Dragovoljac (Croatian: Volunteer; Zagreb football club)
HD➣Helicopter Director
HD➣Humidity Detector
HD➣Hepatosis Dietetica
HD➣Heloma Durum
HD➣Heavy Decoy
HD➣Horizontal Decelerator
HD➣Household Drivers
HD➣Half Sized Diazo Non-Reproducible Drawing
HD➣Hydraulic Fluid, Diving

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