English Words Starting With H

• hydrobomb

  nounVery low (Obscure/Technical)
  /ˈhaɪ.drəʊ.bɒm/A specific type of explosive device or ordnance, often designed for underwater detonation or with a water-related dispersal mechanism.
• hydrobromic acid

  nounC2+
  /ˌhaɪ.drəʊˌbrəʊ.mɪk ˈæs.ɪd/A strong, corrosive acid formed by dissolving hydrogen bromide in water, with the chemical formula HBr.
• hydrobromide

  nounVery Low
  /ˌhaɪ.drəʊˈbrəʊ.maɪd/A crystalline chemical compound formed by the combination of hydrobromic acid with an organic base, particularly used in medicinal chemistry to improve stability or solubility.
• hydrocarbon

  nounC1
  /ˌhaɪ.drəʊˈkɑː.bən/An organic compound consisting entirely of hydrogen and carbon atoms.
• hydrocast

  nounVery Low
  /ˈhaɪdrə(ʊ)kɑːst/A set of measurements of water properties (temperature, salinity, pressure) taken at different depths at a single location in a body of water.
• hydrocele

  nounC2+
  /ˈhaɪdrə(ʊ)ˌsiːl/A medical condition characterized by a collection of serous fluid in a body cavity, most commonly in the membrane around a testicle.
• hydrocellulose

  nounVery Low
  /ˌhaɪ.drəʊˈsel.jə.ləʊs/A material formed by the partial hydrolysis of cellulose, where the fiber structure is broken down but the cellulose chains are not completely dissolved.
• hydrocephalus

  nounC2
  /ˌhaɪ.drəʊˈsef.ə.ləs/A medical condition where an excessive amount of cerebrospinal fluid accumulates within the brain's ventricles, causing enlargement and pressure.
• hydrochloric acid

  nounC1
  /ˌhaɪ.drəˌklɒr.ɪk ˈæs.ɪd/A strong, corrosive acid formed by dissolving hydrogen chloride gas in water. Its chemical formula is HCl.
• hydrochloride

  nounC1/C2
  /ˌhaɪ.drəˈklɔː.raɪd/A chemical compound formed by the reaction of an organic base with hydrochloric acid, typically used to make a drug substance more stable or soluble.
• hydrochlorothiazide

  nounC2
  /ˌhaɪ.drəʊˌklɔː.rəʊˈθaɪ.ə.zaɪd/A diuretic drug used to treat high blood pressure and fluid retention.
• hydrocinnamic acid

  nounLow
  /ˌhaɪ.drəʊ.sɪˌnæ.mɪk ˈæ.sɪd/An organic compound consisting of a phenyl group attached to a propionic acid chain (C6H5CH2CH2COOH).
• hydrocinnamic aldehyde

  nounVery Low
  /ˌhaɪ.drəʊ.sɪˌnæm.ɪk ˈæl.dɪ.haɪd/A specific organic chemical compound with the formula C9H10O, formally known as 3-phenylpropanal.
• hydrocodone

  nounLow (Specialized Medical Vocabulary)
  /ˌhʌɪdrə(ʊ)ˈkəʊdəʊn/A powerful semi-synthetic opioid medication derived from codeine, used primarily for pain relief and as a cough suppressant.
• hydrocolloid

  nounC2
  /ˌhaɪ.drəʊˈkɒl.ɔɪd/A substance that forms a gel or thickening agent when mixed with water.
• hydrocooling

  nounVery Low
  /ˈhaɪ.drəˌkuː.lɪŋ/A process of rapidly cooling produce (especially fruits and vegetables) by using cold water or ice water to remove field heat after harvest.
• hydrocoral

  nounLow
  /ˌhaɪ.drəʊˈkɒr.əl/A marine colonial organism, similar in appearance to coral but belonging to the class Hydrozoa, that secretes a hard, calcareous or proteinaceous skeleton.
• hydrocortisone

  nounC1
  /ˌhaɪdrəʊˈkɔːtɪzəʊn/A steroid hormone (also called cortisol) naturally produced by the adrenal glands; used as a medication to reduce inflammation and treat various skin conditions, allergies, and autoimmune disorders.
• hydrocrack

  verb-transitiveVery Low
  /ˈhaɪ.drəʊ.kræk/To break down heavy, complex hydrocarbons into lighter, simpler ones (like petrol/gasoline) using hydrogen and high temperature and pressure.
• hydrocracker

  nounLow (Specialized)
  /ˈhaɪdrəʊˌkrækə/An industrial plant or a processing unit in a refinery that breaks down heavy, complex hydrocarbon molecules into lighter, more valuable products like gasoline, diesel, and jet fuel by using hydrogen under high pressure and temperature in the presence of a catalyst.

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