English Words Starting With H

• hydrastine

  nounVery Low (Scientific/Technical)
  /haɪˈdræs.tiːn/An alkaloid isolated from the rhizome of the goldenseal plant (Hydrastis canadensis).
• hydrastinine

  nounVery Low
  /ˌhaɪdræˈstɪniːn/A chemical compound derived from the degradation of hydrastine, an alkaloid found in the goldenseal plant (Hydrastis canadensis).
• hydrastis

  nounVery Low
  /haɪˈdræstɪs/A genus of perennial herbs, specifically Hydrastis canadensis, also known as goldenseal.
• hydrate

  nounverbverb-ambitransitiveB2
  /haɪˈdreɪt/To supply water or moisture to something; to combine chemically with water.
• hydration number

  nounVery Low (C2/Specialist)
  /haɪˈdreɪʃən ˈnʌmbər/The number of water molecules bound to a central ion in an aqueous solution.
• hydrator

  nounC1
  /haɪˈdreɪ.tə(r)/A container, appliance, or substance specifically designed to add or retain moisture.
• hydraulic accumulator

  nounC2
  /haɪˌdrɒlɪk əˈkjuːmjəleɪtə(r)/A pressure storage reservoir in a hydraulic system that stores fluid under pressure, typically using a compressed gas to provide the energy-storing medium.
• hydraulic brake

  nounC1
  /haɪˌdrɒl.ɪk ˈbreɪk/A braking system in which force is transmitted from the brake pedal to the brake mechanism using a fluid.
• hydraulic cement

  nounC1
  /haɪˈdrɒlɪk sɪˈmɛnt/A type of cement that sets and hardens through chemical reaction with water, forming a water-resistant product.
• hydraulic coupling

  nounLow (technical)
  /haɪˈdrɒlɪk ˈkʌplɪŋ/A mechanical device that uses a fluid to transmit rotational power between a driving and a driven shaft, often allowing for slip and smooth engagement.
• hydraulic fluid

  nounC1
  /haɪˈdrɒl.ɪk ˈfluː.ɪd/A liquid, typically an oil-based or synthetic medium, used to transmit power in hydraulic machinery.
• hydraulic fracturing

  nounC1+
  /haɪˌdrɒlɪk ˈfræk.tʃər.ɪŋ/A technique to extract oil or natural gas from underground rock formations by injecting high-pressure fluid to create fractures.
• hydraulic lift

  nounC1
  /haɪˌdrɒl.ɪk ˈlɪft/A device that uses the incompressibility of a fluid, typically oil, in a sealed system to raise or lower heavy objects, often a platform.
• hydraulic mining

  nounC1
  /haɪˌdrɒl.ɪk ˈmaɪ.nɪŋ/A method of mining that uses high-pressure water jets to dislodge rock material or sediment to extract minerals.
• hydraulic motor

  nounC2
  /haɪˈdrɒlɪk ˈməʊtə/A mechanical actuator that converts hydraulic pressure and flow into rotational mechanical energy (torque and rotation).
• hydraulic pile

  nounlow
  /haɪˈdrɒlɪk paɪl/A pile driven into the ground using hydraulic force, typically for foundation support in construction.
• hydraulic press

  nounC1
  /haɪˌdrɒlɪk ˈpres/A machine tool that uses a hydraulic cylinder to generate a compressive force, typically used for forging, stamping, forming, and pressing materials.
• hydraulic radius

  nounC2
  /haɪˌdrɒl.ɪk ˈreɪ.di.əs/A measure used in fluid mechanics and hydraulics, defined as the cross-sectional area of a flow divided by its wetted perimeter.
• hydraulic ram

  nounLow (Technical)
  /haɪˌdrɒlɪk ˈræm/A type of water pump that uses the kinetic energy of a large amount of falling water to pump a smaller amount of water to a higher elevation without using an external power source.
• hydraulic suspension

  nounC2
  /haɪˌdrɒl.ɪk səˈspen.ʃən/A vehicle suspension system that uses pressurized hydraulic fluid to absorb shocks and control wheel movement.

Showing 5401–5420 of 5990 words.