See Also: Minimal lethal dose(medicine)
minimal dose(medicine)
minimal infecting dose(medicine)
minimal reacting dose(medicine)
Lethal dose(medicine)
lethal dose 50(medicine)
minimal air(medicine)
minimal(dictionary)
Minimal(medicine)
minimal(dictionary)

sienna (iou) and Minimal lethal dose (medicine)


sienna (iou)



sienna noun. Also (in sense 2) Siena. L18.
[from Siena, a city and province in Tuscany, western Italy.]
A ferruginous earth used as a pigment in oil and watercolour painting; the colour of this pigment, a yellowish or (when roasted) rich reddish brown. Also more fully Terra Sienna. L18.
BURNT sienna. raw sienna: see RAW adjective.
Sienna marble, a reddish mottled stone obtained from the area around Siena. L18.

Minimal lethal dose (medicine)


minimal lethal dose
<pharmacology> The minimal dose of a toxic substance or infectious agent that is lethal, as assayed in various experimental animals (e.g., the least amount of diphtheria toxin that, on an average, kills a 250-g guinea pig within 96 hours after subcutaneous inoculation).

When followed by a subscript (generally "MLD50"), denotes the minimal dose that is lethal to a certain percentage (e.g., 50%) of animals so assayed, LD05.

See: lethal dose.