The outside boundary, parts or surface of something. / A first-rank administrative division of Greece, subdivided into provinces.

Dangerous, full of peril.

(intransitive) To decay and disappear; to waste away to nothing. / (intransitive) To decay in such a way that it cannot be used for its original purpose / (intransitive) To die; to cease to live.

(mathematics) The sum of the distance of all the lengths of the sides of an object. / (mathematics) The length of such a boundary. / The outer limits of an area. See synonyms at circumference.

A publication issued regularly, but less frequently than daily.

Periodic. / Published at regular intervals of more than one day, especially weekly, monthly, or quarterly. / Of, or relating to such a publication.

(computing) Any hardware (i.e. handheld, computer, laptop) containing vast amounts of information, which is in constant flux and is important to the owner but not so important as to be stored in wetware.

Relative to a period or periods. / Having repeated cycles. / Occurring at regular intervals. / Periodical. / (astronomy) Pertaining to the revolution of a celestial object in its orbit.

Relating to the highest oxidation state of iodine; of or derived from a periodic acid.

(inorganic chemistry) HIO₄ or H₅IO₆, the oxyacids of iodine in which iodine has the highest oxidation number; H₅IO₆ is a white crystalline substance (HIO₄ is not stable), and both are strong oxidizing agents.