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English Words Starting With L

5,456 entries — pick a word to see its definition, pronunciation, and usage.

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

leucine
nounC2
/ˈluː.siːn/An essential amino acid, important for protein synthesis and muscle repair.
leucippus
nounVery Low (C2/Proficiency)
/luːˈsɪpəs/A proper noun referring to Leucippus, an ancient Greek pre-Socratic philosopher (5th century BCE) who is credited as the founder of atomism, the theory that the universe is composed of indivisible particles (atoms) moving in void.
leucite
nounVery rare (technical term)
/ˈluːsaɪt/A mineral composed of potassium and aluminum silicate, typically found in igneous rocks.
leuco base
nounC2
/ˈluːkəʊ ˌbeɪs/A colourless or weakly coloured chemical compound that can be converted into a dye or pigment by oxidation.
leucoblast
nounVery Low
/ˈluːkəʊblɑːst/An immature white blood cell, precursor to a mature leucocyte.
leucocyte
nounC2
/ˈluː.kə.saɪt/A type of colourless cell in the blood, bone marrow, and lymphatic tissue, forming part of the immune system and involved in defending the body against infection and foreign substances.
leucocytosis
nounLow
/ˌluːkə(ʊ)sʌɪˈtəʊsɪs/An increase in the number of white cells in the blood, typically due to infection, inflammation, or other disease processes.
leucoderma
nounC1+
/ˌluːkə(ʊ)ˈdɜːmə/A skin condition characterised by white patches resulting from the loss of pigmentation.
leucoline
nounVery Low
/ˈluːkəliːn/A heterocyclic organic compound, also known as quinoline, with the chemical formula C9H7N.
leucoma
nounRare
/luːˈkəʊ.mə/A white, opaque scar or cloudiness on the cornea of the eye.
leucomaine
nounVery Rare
/ˈluːkəmeɪn/An alkaloid substance, often toxic, produced during putrefaction or by certain metabolic processes in animal tissues.
leucon
nounC2/Highly Specialized
/ˈluːkɒn/A type of complex canal system in certain sponges (phylum Porifera).
leucopenia
nounC2 / Highly Technical
/ˌluː.kəʊˈpiː.ni.ə/A medical condition characterized by an abnormally low count of white blood cells (leukocytes) in the blood.
leucoplakia
nounLow
/ˌluː.kə(ʊ)ˈpleɪ.kɪ.ə/A white patch or plaque on a mucous membrane, especially in the mouth, that cannot be wiped off.
leucoplast
nounRare
/ˈluːkə(ʊ)plast/A colourless organelle found in plant cells, involved in the storage of nutrients like starch, lipids, or proteins.
leucopoiesis
nounVery rare / Technical
/ˌluː.kəʊ.pɔɪˈiː.sɪs/The biological process of white blood cell formation and development.
leucorrhoea
nounLow (Technical/Medical)
/ˌluːkəˈriːə/A thick, whitish or yellowish vaginal discharge, often with an unpleasant odour.
leucosis
nounRare
/ljuːˈkəʊsɪs/A pathological increase in the number of white blood cells; a general term for diseases affecting leukocytes (white blood cells).
leucothea
nounVery Low
/ljuːˈkɒθɪə/A sea goddess in Greek mythology, the deified Ino, who aids sailors in distress.
leucothoe
nounVery low
/luːˈkɒθəʊiː/A genus of broad-leaved evergreen shrubs, primarily valued as ornamental garden plants for their foliage and spring flowers.

Showing 2401–2420 of 5456 words.