a. (Med.) Efficacious in curing toothache. -- n. A remedy for toothache. [ 1913 Webster ]

n. (Chem., Med.) a chemical substance consisting of tyrosine with two hydrogen atoms on the benzene ring replaced by iodine atoms. The isomer 3, 5-diiodotyrosine is an inhibitor of thyroid function. [ WordNet 1.5 ]

n. [ Gr. di- = di`s- twice + 'odoy`s, 'odo`ntos, a tooth: cf. F. diodon. ] 1. (Zool.) A genus of spinose, plectognath fishes, having the teeth of each jaw united into a single beaklike plate. They are able to inflate the body by taking in air or water, and, hence, are called globefishes, swellfishes, etc. Called also porcupine fishes, and sea hedgehogs. [ 1913 Webster ]

2. (Zool.) A genus of whales. [ 1913 Webster ]

a. (Zool.) Like or pertaining to the genus Diodon. -- n. A fish of the genus Diodon, or an allied genus. [ 1913 Webster ]

{ } (Chem.) A prefix, or combining from, indicating iodine as an ingredient; as, iodoform. [ 1913 Webster ]

n. (Chem.) a compound containing the covalent iodine radical. [ WordNet 1.5 ]

n. [ Iodo- + cresol. ] (Org. Chem.) Any of several isomeric iodine derivatives of the cresols, C6H3I(CH3)OH, esp. one, an odorless amorphous powder, used in medicine as a substitute for iodoform. [ Webster 1913 Suppl. ]

n. [ Iodo- + formyl. See Formyl, and cf. Chloroform. ] (Chem.) A yellow, crystalline, volatile substance, CI3H, having an offensive odor and sweetish taste, and analogous to chloroform. It is used in medicine as a healing and antiseptic dressing for wounds and sores. [ 1913 Webster ]

n. [ Iodoform + -gen root of gi`gnesqai to be born. ] (Pharm.) A light powder used as a substitute for iodoform. It is a compound of iodoform and albumin. [ Webster 1913 Suppl. ]

n. [ Iodo- + pyrrol. ] (Chem.) A crystallized substance of the composition C4I4NH, technically tetra-iodo-pyrrol, used like iodoform. [ Webster 1913 Suppl. ]

n. [ Iodo- + quinine. ] (Chem.) A iodide of quinine obtained as a brown substance, . It is the base of herapathite. See Herapathite. [ 1913 Webster ]

n. [ Iodo- + thyro- + -in. ] (Physiol. Chem.) A peculiar substance obtained from the thyroid gland, containing from nine to ten per cent of iodine.

☞ It is a very stable compound, and is believed to be active principle in thyroid extracts and in the internal secretion of the thyroid gland. It was originally called thyroiodin. [ Webster 1913 Suppl. ]

☞ It is probably an impure extract of thyroid gland, containing thyroxine. See Merck Index 11th Ed. #9345, the entry for thyroidin. [ PJC ]

a. (Chem.) Pertaining to, or containing, iodine. See -ous (chemical suffix). [ 1913 Webster ]

Iodous acid, a hypothetical acid, analogous to chlorous acid. [ 1913 Webster ]

prop. n. A natural family of fishes closely related to greenlings (fish of the genus Hexagrammos).
Syn. -- family Ophiodontidae. [ WordNet 1.5 ]

a. [ Pref. peri- + Gr. 'odoy`s, 'odo`ntos, tooth. ] (Anat.) Surrounding the teeth. [ 1913 Webster ]

n. (Med.) A disease that attacks the gum and bone around the teeth.
Syn. -- periodontal disease. [ WordNet 1.5 ]

n. [ Period + -scope. ] (Med.) A table or other means for calculating the periodical functions of women. Dunglison. [ 1913 Webster ]

a. (Zool.) Same as Rhachiodont. [ 1913 Webster ]

a. [ Gr. "ra`chis, -ios, the spine + &unr_;&unr_;&unr_;, &unr_;&unr_;&unr_;, a tooth.] (Zool.) Having gular teeth formed by a peculiar modification of the inferior spines of some of the vertebrae, as certain South African snakes (Dasypeltis) which swallow birds' eggs and use these gular teeth to crush them. [1913 Webster]

n. (Paleon.) One of the Theriodontia. Used also adjectively. [ 1913 Webster ]

‖n. pl. [ NL. ] (Paleon.) Same as Theriodontia. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. &unr_; (dim. of &unr_; a beast) + &unr_;, &unr_;, a tooth. ] (Paleon.) An extinct order of reptiles found in the Permian and Triassic formations in South Africa. In some respects they resembled carnivorous mammals. Called also Theromorpha. [ 1913 Webster ]

☞ They had biconcave vertebrae, ambulatory limbs, and a well-developed pelvis and shoulder girdle. Some of the species had large maxillary teeth. The head somewhat resembled that of a turtle. The Dicynodont is one of the best-known examples. See Dicynodont. [ 1913 Webster ]