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Subclass prototheria

💡 Words with a Similar Meaning to "Subclass prototheria"

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WordDefinition
prototheria(from Greek πρώτος, prōtos, first, + θήρ, thēr, wild animal) an obsolete subclass of mammals which includes the living Monotremata and to which a variety of extinct groups, including Morganucodonta, Docodonta, Triconodonta and Multituberculata, have also been assigned.
protostomenounAny animal, of the taxon Protostomia, in which the mouth is derived from the embryonic blastopore
protozoonnoun(cytology) A protozoan.
protopoditenoun(zoology) The basal segment of the limb of a crustacean
protoceratopsnouna genus of small protoceratopsid dinosaurs that lived in Asia during the Late Cretaceous, around 75 to 71 million years ago.
phylum protozoanounin some classifications considered a superphylum or a subkingdom; comprises flagellates; ciliates; sporozoans; amoebas; foraminifers
protohumannounOne of the earliest humans preceding Homo sapiens.
protozoologynounThe study of protozoa.
paranthropusnouna genus of extinct hominin which contains two widely accepted species: P. robustus and P. boisei.
protozoicnounOf or relating to the protozoa.
protodermnoun(botany) the primary meristem from which the epidermis develops
subphylum vertebratanounfishes; amphibians; reptiles; birds; mammals
metatherianoun(from Greek , 'changed' and , 'beast'; ) a mammalian clade that includes all mammals more closely related to marsupials than to placentals.
pterosaurianounextinct flying reptiles: pterosaurs
protoplasmic(cytology) Of or relating to protoplasm.
proterozoicnoun(geology) The eon from 2,500 Ma to 541.0±1.0 Ma, the beginning of the Phanerozoic, marked by the build up of oxygen in the atmosphere and the emergence of primitive multicellular life.
class chilopodanounarthropods having the trunk composed of numerous somites each bearing one pair of legs: centipedes
protistanouneukaryotic one-celled living organisms distinct from multicellular plants and animals: protozoa, slime molds, and eukaryotic algae
protozoannoun(cytology) Any of the diverse group of eukaryotes, of the phylum Protozoa, that are primarily unicellular, existing singly or aggregating into colonies, are usually nonphotosynthetic, and are often classified further into phyla according to their capacity for and means of motility, as by pseudopods, flagella, or cilia.
protoplasmnoun(cytology) The entire contents of a cell comprising the nucleus and the cytoplasm. It is a semi-fluid, transparent substance which is the living matter of plant and animal cells.

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