[ Gr. &unr_; a myriad. See Myriad. ] A prefix, esp. in the metric system, indicating ten thousand, ten thousand times; as, myriameter. [ 1913 Webster ]

a. [ Gr. &unr_; numberless + 'a`kanqa a spine. ] (Zool.) Having numerous spines, as certain fishes. [ 1913 Webster ]

n. [ Gr. &unr_;, &unr_;, fr. &unr_; numberless, pl. &unr_; ten thousand: cf. F. myriade. ] 1. The number of ten thousand; ten thousand persons or things. [ 1913 Webster ]

2. An immense number; a very great many; an indefinitely large number. [ 1913 Webster ]

a. Consisting of a very great, but indefinite, number; as, myriad stars. [ 1913 Webster ]

{ } n. [ F. myriagramme. See Myria-, and 3d Gram. ] A metric weight, consisting of ten thousand grams or ten kilograms. It is equal to 22.046 lbs. avoirdupois. [ 1913 Webster ]

{ } n. [ F. myrialitre. See Myria-, and Liter. ] A metric measure of capacity, containing ten thousand liters. It is equal to 2641.7 wine gallons. [ 1913 Webster ]

{ } n. [ F. myriamètre. See Myria-, and Meter. ] A metric measure of length, containing ten thousand meters. It is equal to 6.2137 miles. [ 1913 Webster ]

n. [ Cf. F. myriapode. ] (Zool.) One of the Myriapoda. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. &unr_; numberless + -poda. ] (Zool.) A class, or subclass, of arthropods, related to the hexapod insects, from which they differ in having the body made up of numerous similar segments, nearly all of which bear true jointed legs. They have one pair of antennae, three pairs of mouth organs, and numerous tracheae, similar to those of true insects. The larvae, when first hatched, often have but three pairs of legs. See Centiped, Galleyworm, Milliped. [ 1913 Webster ]

☞ The existing Myriapoda are divided into three orders: Chilopoda, Chilognatha or Diplopoda, and Pauropoda (see these words in the Vocabulary). Large fossil species (very different from any living forms) are found in the Carboniferous formation. [ 1913 Webster ]

n. [ Gr. &unr_;, &unr_;; &unr_; ten thousand + &unr_; chief. ] A captain or commander of ten thousand men. [ 1913 Webster ]