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English Words Starting With H

5,990 entries — pick a word to see its definition, pronunciation, and usage.

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Noun Verb Adjective Adverb Plural noun Combining form Verb (transitive)Verb (intransitive)Verb (ambitransitive)

hemistich
nounVery Low
/ˈhɛmɪstɪk/Half of a line of verse, especially when divided by a caesura.
hemiterpene
nounVery Low
/ˌhɛmɪˈtɜːpiːn/A terpenoid compound containing five carbon atoms (half the skeleton of a monoterpene).
hemitrope
adjectivenounVery Low
/ˈhɛmɪtrəʊp/Relating to a crystal that is twinned, i.e., composed of two parts that are in reversed positions with respect to each other.
hemizygote
nounC2
/ˌhɛmɪˈzaɪɡəʊt/An individual organism that has only one allele of a particular gene or genes in a chromosome pair, typically because the corresponding allele is missing on the homologous chromosome.
hemline
nounC1
/ˈhɛmlaɪn/The line formed by the bottom edge of a skirt, dress, or coat.
hemlock
nounC1
/ˈhɛmlɒk/A highly poisonous plant, particularly a tall, herbaceous plant of the parsley family with a hollow stem and small white flowers.
hemlock looper
nounLow
/ˈhɛmlɒk ˈluːpə/A specific type of geometrid moth (Lambdina fiscellaria) whose larvae feed on and damage coniferous trees, particularly hemlocks.
hemmer
nounC2
/ˈhɛm.ə/One who or that which hems; specifically a person who sews hems, or a sewing machine attachment for turning and stitching fabric edges.
hemoblast
nounVery Low
/ˈhiːmə(ʊ)blɑːst/An immature blood cell; a stem cell in the blood-forming system.
hemochromatosis
nounC2 (Low frequency; highly technical/specialized)
/ˌhiːmə(ʊ)ˌkrəʊməˈtəʊsɪs/A genetic disorder causing the body to absorb too much iron.
hemochrome
nounRare
/ˈhiːməkrəʊm/A respiratory pigment found in the blood of some invertebrates, containing iron in its structure and responsible for oxygen transport.
hemocoel
nounVery Low
/ˈhiːmə(ʊ)ˌsiːl/The primary body cavity in many invertebrates, such as arthropods and molluscs, where blood (hemolymph) circulates and bathes the internal organs directly.
hemoconcentration
nounC2
/ˌhiːməʊˌkɒnsənˈtreɪʃ(ə)n/An increase in the concentration of red blood cells and other formed elements in the blood, typically due to a loss of plasma volume.
hemocyanin
nounC2
/ˌhiːmə(ʊ)ˈsaɪənɪn/A type of respiratory pigment, containing copper, that transports oxygen in the blood plasma of some molluscs and arthropods.
hemocyte
nounC2
/ˈhiːmə(ʊ)sʌɪt/A blood cell, especially in invertebrates.
hemocytoblast
nounVery Rare
/ˌhiːmə(ʊ)ˈsaɪtə(ʊ)blɑːst/The most primitive, undifferentiated blood cell precursor from which all blood cells are derived.
hemocytometer
nounC2+
/ˌhiː.məʊ.saɪˈtɒm.ɪ.tər/A specialized microscope slide with a precisely ruled grid, used to count blood cells.
hemodia
nounLow (Specialist Medical Term)
/ˌhiːməʊˈdaɪə/The process of filtering a patient's blood outside their body to remove waste and excess fluid when the kidneys are not functioning properly.
hemodialysis
nounC2
/ˌhiːməʊdaɪˈælɪsɪs/A medical procedure in which a machine filters waste products and excess fluid from the blood when the kidneys are not functioning properly.
hemodialyzer
nounLow
/ˌhiːməʊˈdaɪəlaɪzə/A medical device that performs hemodialysis by removing waste products and excess fluid from the blood of patients with kidney failure.

Showing 2341–2360 of 5990 words.