| English Dictionary |
PLEOMORPHISM
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Dictionary entry overview: What does pleomorphism mean?
• PLEOMORPHISM (noun)
The noun PLEOMORPHISM has 2 senses:
1. (chemistry) the existence of different kinds of crystal of the same chemical compound
2. (biology) the appearance of two or more distinctly different forms in the life cycle of some organisms
Familiarity information: PLEOMORPHISM used as a noun is rare.
Dictionary entry details
Sense 1
Meaning:
(chemistry) the existence of different kinds of crystal of the same chemical compound
Classified under:
Nouns denoting natural phenomena
Synonyms:
pleomorphism; polymorphism
Hypernyms ("pleomorphism" is a kind of...):
chemical phenomenon (any natural phenomenon involving chemistry (as changes to atoms or molecules))
Domain category:
chemical science; chemistry (the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions)
Hyponyms (each of the following is a kind of "pleomorphism"):
dimorphism ((chemistry) the property of certain substances that enables them to exist in two distinct crystalline forms)
Derivation:
pleomorphic (relating to or characterized by pleomorphism)
Sense 2
Meaning:
(biology) the appearance of two or more distinctly different forms in the life cycle of some organisms
Classified under:
Nouns denoting natural phenomena
Hypernyms ("pleomorphism" is a kind of...):
organic phenomenon ((biology) a natural phenomenon involving living plants and animals)
Domain category:
biological science; biology (the science that studies living organisms)
Derivation:
pleomorphic (relating to or characterized by pleomorphism)
Context examples
An endometrioid stromal sarcoma that arises from the ovary and is characterized by the absence of marked pleomorphism and nuclear atypia in the neoplastic mesenchymal cells.
(Ovarian Low Grade Endometrioid Stromal Sarcoma, NCI Thesaurus)
A non-invasive pancreatic intraductal papillary mucinous neoplasm characterized by the presence of neoplastic epithelial cells that exhibit loss of polarity, nuclear stratification, hyperchromasia, and pleomorphism.
(Pancreatic Intraductal Papillary-Mucinous Neoplasm with High Grade Dysplasia, NCI Thesaurus)
Nuclear pleomorphism, necrotic changes, and a high mitotic rate are also present.
(Cervical Adenoid Cystic Carcinoma, NCI Thesaurus)
The undifferentiated stromal sarcoma is characterized by an aggressive clinical course, the presence of significant cellular atypia, pleomorphism, and high mitotic activity.
(Endometrioid Stromal Sarcoma, NCI Thesaurus)
It is characterized by the presence of hepatocytes with enlarged nuclei and cytoplasm, nuclear pleomorphism, multinucleation, and hyperchromasia.
(Hepatocellular Large Cell Change, NCI Thesaurus)
A sarcoma characterized by the presence of osteoclast-like giant cells and cellular pleomorphism.
(Giant Cell Fibrous Histiocytoma, NCI Thesaurus)
A high grade B-cell lymphoma showing greater pleomorphism in nuclear size and shape than the classical Burkitt lymphoma.
(High Grade Burkitt-Like Lymphoma, NCI Thesaurus)
The term benign indicates the absence of morphologic features associated with malignancy (for instance severe atypia, nuclear pleomorphism, tumor cell necrosis, and abnormal mitoses).
(Benign Neoplasm, NCI Thesaurus/CDISC)
The basaloid cells exhibit nuclear pleomorphism, hyperchromasia, and loss of polarity.
(Penile Intraepithelial Neoplasia, NCI Thesaurus)
A usually aggressive malignant epithelial neoplasm composed of cells with significant cytologic atypia and nuclear pleomorphism.
(Pleomorphic Carcinoma, NCI Thesaurus)
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