Polyhedroid may refer to:

• A 4-polytope
• A form of agate crystal

• .hta
• HTA
• H:TABLE
• HTAccess
• H. Taine
• HT Anstruther
• HTA (programming language)
• Htb
• HTB
• H. T. Bartlett
• HTBLA
• H.T. Buckle
• HTC 8925
• HTC Advantage X7500
• Htc apache
• HTC Apache
• HTC Artemis
• HTC Athena
• HTC Blue Angel
• HTCC
• HTC Elf
• HTC Excalibur
• H.T. Chen
• H. T. Chen
• HTC Herald