Also known as: ld.
LD has various meanings in the Medical category. Discover the full forms, definitions, and usage contexts of LD in Medical.
A lethal dose is an indication of the lethality of a given substance or type of radiation. Because resistance varies from one individual to another, the 'lethal dose' represents a dose (usually recorded as dose per kilogram of subject body weight) at which a given percentage of subjects will die. The LD may be based on the standard person concept, a theoretical individual that has perfectly "normal" characteristics, and thus not apply to all sub-populations.
MedicalA syrupy, water-soluble liquid, C3H6O3, produced by anaerobic glucose metabolism in muscles, by certain bacteria, and by synthetic methods. Lactic acid is present in fermented foods such as yogurt and sauerkraut and is used in foods and beverages as a flavoring and preservative, in dyeing and textile printing, and in pharmaceuticals.
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