PLACENTAL

Pronunciation (US):

(GB):

 Dictionary entry overview: What does placental mean? 

• PLACENTAL (noun)
  The noun PLACENTAL has 1 sense:

1. mammals having a placenta; all mammals except monotremes and marsupials

  Familiarity information: PLACENTAL used as a noun is very rare.

• PLACENTAL (adjective)
  The adjective PLACENTAL has 1 sense:

1. pertaining to or having or occurring by means of a placenta

  Familiarity information: PLACENTAL used as an adjective is very rare.

 Dictionary entry details 

• PLACENTAL (noun)

Sense 1

Meaning:

Mammals having a placenta; all mammals except monotremes and marsupials

Classified under:

Nouns denoting animals

Synonyms:

eutherian; eutherian mammal; placental; placental mammal

Hypernyms ("placental" is a kind of...):

mammal; mammalian (any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk)

Hyponyms (each of the following is a kind of "placental"):

gnawer; rodent (relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing)

digitigrade; digitigrade mammal (an animal that walks so that only the toes touch the ground as e.g. dogs and cats and horses)

plantigrade; plantigrade mammal (an animal that walks with the entire sole of the foot touching the ground as e.g. bears and human beings)

proboscidean; proboscidian (massive herbivorous mammals having tusks and a long trunk)

colugo; flying cat; flying lemur (arboreal nocturnal mammal of southeast Asia and the Philippines resembling a lemur and having a fold of skin on each side from neck to tail that is used for long gliding leaps)

tree shrew (insectivorous arboreal mammal of southeast Asia that resembles a squirrel with large eyes and long sharp snout)

primate (any placental mammal of the order Primates; has good eyesight and flexible hands and feet)

anteater; pangolin; scaly anteater (toothless mammal of southern Africa and Asia having a body covered with horny scales and a long snout for feeding on ants and termites)

edentate (primitive terrestrial mammal with few if any teeth; of tropical Central America and South America)

pachyderm (any of various nonruminant hoofed mammals having very thick skin: elephant; rhinoceros; hippopotamus)

coney; cony; das; dassie; hyrax (any of several small ungulate mammals of Africa and Asia with rodent-like incisors and feet with hooflike toes)

unguiculate; unguiculate mammal (a mammal having nails or claws)

Unguiculata (in former classifications a major division of Mammalia comprising mammals with nails or claws; distinguished from hoofed mammals and cetaceans)

hoofed mammal; ungulate (any of a number of mammals with hooves that are superficially similar but not necessarily closely related taxonomically)

Ungulata (in former classifications a major division of Mammalia comprising all hoofed mammals; now divided into the orders Perissodactyla (odd-toed ungulates) and Artiodactyla (even-toed ungulates))

gnawing mammal; lagomorph (relative large gnawing animals; distinguished from rodents by having two pairs of upper incisors specialized for gnawing)

bat; chiropteran (nocturnal mouselike mammal with forelimbs modified to form membranous wings and anatomical adaptations for echolocation by which they navigate)

aardvark; ant bear; anteater; Orycteropus afer (nocturnal burrowing mammal of the grasslands of Africa that feeds on termites; sole extant representative of the order Tubulidentata)

Fissipedia (in some classifications considered a suborder of Carnivora)

carnivore (a terrestrial or aquatic flesh-eating mammal)

aquatic mammal (whales and dolphins; manatees and dugongs; walruses; seals)

insectivore (small insect-eating mainly nocturnal terrestrial or fossorial mammals)

doe (mature female of mammals of which the male is called 'buck')

buck (mature male of various mammals (especially deer or antelope))

yearling (an animal in its second year)

cow (mature female of mammals of which the male is called 'bull')

bull (mature male of various mammals of which the female is called 'cow'; e.g. whales or elephants or especially cattle)

farm animal; livestock; stock (any animals kept for use or profit)

Holonyms ("placental" is a member of...):

Eutheria; subclass Eutheria (all mammals except monotremes and marsupials)

Derivation:

placental (pertaining to or having or occurring by means of a placenta)

• PLACENTAL (adjective)

Sense 1

Meaning:

Pertaining to or having or occurring by means of a placenta

Context example:

all mammals except monotremes and marsupials are placental mammals

Similar:

transplacental (occurring through or by way of the placenta)

Antonym:

aplacental (having no placenta)

Derivation:

placenta (the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus)

placenta (that part of the ovary of a flowering plant where the ovules form)

placental (mammals having a placenta; all mammals except monotremes and marsupials)

 Context examples 

It is caused by placental transfer of maternal autoantibodies, usually anti-Ro antibody.

(Neonatal Lupus Erythematosus, NCI Thesaurus)

Metastin, encoded by the KISS1 Gene, is a placental truncated C-terminally amidated peptide form of KiSS1 Metastasis Suppressor Protein.

(Metastin, NCI Thesaurus)

It consists of a mixture of blood, mucus, and placental remnants.

(Lochia, NCI Thesaurus)

It is polygonal, possesses a large, vesicular nucleus and is believed to secrete placental prolactin.

(Decidual Cell, NCI Thesaurus)

This can result from sharing space with a smoker or from placental transfer from mother to fetus.

(Passive Smoke Exposure, NCI Thesaurus)

This gene is putatively involved in the regulation of placental growth.

(PHLDA2 Gene, NCI Thesaurus)

Placental Growth Factor is active in angiogenesis, and endothelial cell growth, stimulating their proliferation and migration.

(Placental Growth Factor, NCI Thesaurus/LocusLink)

Placental blood contains high levels of stem cells needed to produce new blood cells.

(Placental blood transplantation, NCI Dictionary)

A malignant neoplasm arising from placental trophoblast cells.

(Choriocarcinoma, NCI Thesaurus/CDISC)

This gene plays a role in placental development.

(CSF1 Gene, NCI Thesaurus)