+define phylum
1. (Biology) a major taxonomic division of living organisms that contain one or more classes. An example is the phylum Arthropoda (insects, crustaceans, arachnids, etc, and myriapods). phylum. any of the basic divisions of the plant or animal kingdom. Cf. phylon. any of the basic divisions of the plant or animal kingdom. any of the major subdivisions of the plant or animal kingdom. LINK / CITE ADD TO WORD LIST. noun. The definition of a phylum is a major category of living organisms, or a group of genetically related language families. 1  An example of a phylum is Mollusca which means an invertebrate animal such as an octopus. The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning. Blog. A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today. Definition and synonyms of phylum from the online English dictionary from Macmillan Publishers Limited. &raquo more... The social dynamics of human history, even more than that of biological evolution, illustrate the fundamental principle of ecological evolution-that everything depends on everything else. 1 An example of a phylum is Mollusca which means an invertebrate animal such as an octopus. 2  An example of a phylum is the group of Indo-European languages spoken in Europe, Asia, North America, South America and Oceania. 90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent. subphylum - (biology) a taxonomic group ranking between a phylum and a class. class - (biology) a taxonomic group containing one or more orders. division - (botany) taxonomic unit of plants corresponding to a phylum. Translations. » more... The social dynamics of human history, even more than that of biological evolution, illustrate the fundamental principle of ecological evolution-that everything depends on everything else.
A major category of living organisms.