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Definition of thallium
: a soft poisonous metallic element that resembles lead in physical properties, occurs sparsely in a number of common ores, and is used chiefly in the form of compounds especially in photosensitive devices and formerly as a pesticide — see element table
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Recent Examples of thallium from the Web
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One of Koremlu’s active ingredients was thallium acetate.
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Yes, Dr. Li had specialized knowledge and access to thallium but as a Joann Curley proves, such training isn’t really necessary for a determined killer.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'thallium'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of thallium
New Latin, from Greek thallos green shoot; from the bright green line in its spectrum
Medical Dictionary
thallium
playMedical Definition of thallium
: a sparsely but widely distributed poisonous metallic element that resembles lead in physical properties and is used chiefly in the form of compounds in photoelectric cells or as a pesticide—symbol Tl; see element table
Learn More about thallium
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See words that rhyme with thallium Britannica.com: Encyclopedia article about thallium
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