9-Letter Words Containing: O,N,I,S,T

• a powerful neurotoxin produced by certain dinoflagellates found in red tides; it can accumulate in mollusks that feed on the dinoflagellates and cause food poisoning to humans

• A cell that divides by schizogony.

• crested ill-smelling South American bird whose young have claws on the first and second digits of the wings

• a toxin that is secreted by microorganisms into the surrounding medium

• hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells

• hormone secreted by the posterior pituitary gland (trade name Pitocin); stimulates contractions of the uterus and ejection of milk

• a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium

• collect and study plants