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Vocabulary Builder — Essay & Answer Writing

Hydrodynamic

adjective / hy-droh-dy-NAM-ik / Hard
Meaning

Relating to the motion of fluids (especially water) and the forces acting on solid bodies immersed in or moving through fluids; pertaining to the science of fluid mechanics in motion

Origin / Etymology

Greek hydro (water) + dynamikos (powerful) — from dynamis (power, force)

Synonyms
Fluid-dynamic Aquadynamic Streamlined
Antonyms
Static Aerodynamic (when applied to air rather than water)
Example Sentence
"The Large Cavitation Tunnel at NSTL Visakhapatnam provides hydrodynamic testing for submarine hulls, enabling Indian engineers to simulate deep-sea pressure conditions and optimise the design of INS Arihant-class vessels."
🎯 UPSC Usage

Relevant for GS3 (Science & Technology — naval propulsion, submarine design, defence R&D). Key context: DRDO's Naval Science and Technological Laboratory (NSTL) at Visakhapatnam operates India's first Large Cavitation Tunnel (LCT) for hydrodynamic testing. Used in ATV Programme (Advanced Technology Vessel) — developing INS Arihant and Arighat submarines. Hydrodynamic efficiency determines submarine speed, stealth, and fuel consumption.

Relevant Subjects
Science Tech Security Defence
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