undifferentiated
undifferentiated — adjective
- undifferentiatedpositive
- more undifferentiatedcomparative
- most undifferentiatedsuperlative
1. Used to describe a group, a mass, or a set whose parts or members are so alike t
Used to describe a group, a mass, or a set whose parts or members are so alike that they are not treated as separate or distinct from one another — for example, when a teacher gives a single score for a whole course instead of separate marks for each topic, or when a mixture of ingredients looks like one uniform blob rather than individual pieces.
Wei was frustrated that the survey gave only one undifferentiated score for the entire programme.
undifferentiated + score; attributive use with singular countable noun
After two hours of simmering, the vegetables had turned into an undifferentiated brown mass.
undifferentiated + mass; collocation for describing blended mixtures
To a visitor, the old apartment buildings look like one undifferentiated stretch of grey concrete.
The committee treated all the complaints as an undifferentiated lump, never examining each case separately.
The company budget was one undifferentiated number, with no breakdown for individual departments.
- uniform
More positive in tone — suggests consistent quality or appearance, not a lack of useful distinctions
- homogeneous
More technical; commonly used in scientific or academic writing about mixtures, populations, or samples
- indistinguishable
Focuses on the difficulty of telling two or more items apart, rather than on an undivided whole
- differentiated
The direct opposite — having clear internal distinctions or specialised parts
- varied
Emphasises diversity of parts or members within a group
- distinct
Describes parts or sections that are clearly separate from one another
文法句型
undifferentiated + noun
be + undifferentiated
用法筆記
Often appears in formal or academic contexts to criticise a lack of nuance or detail — for example, in phrases like 'undifferentiated mass' or 'undifferentiated lump' the tone is mildly negative, suggesting that important distinctions have been ignored.
常見錯誤
2. Describes biological cells or tissue that have not yet developed the specialised
Describes biological cells or tissue that have not yet developed the specialised structures or functions of a mature cell type — for example, stem cells in an embryo that can still turn into skin, nerve, or muscle cells, or tumour cells that look primitive and do not resemble the normal tissue around them.
The research team is studying how undifferentiated stem cells decide which type of nerve cell to become.
technical term: undifferentiated stem cells; subject is a research team
Unlike mature blood cells, undifferentiated cells can divide and develop into many types of tissue.
The pathology report called the tumour undifferentiated, meaning its cells did not look like normal tissue.
Dr. Okonkwo extracted undifferentiated cells from the bone marrow of mice for the experiment.
In an early embryo, undifferentiated tissue develops into organs like the heart and lungs.
- unspecialised
A more accessible everyday synonym for the same biology concept; 'unspecialised cells' is common in British English
- primitive
Used in pathology to describe cells that look like early, undeveloped forms — but can carry a negative judgment outside science
- differentiated
The direct opposite — cells or tissue that have taken on specialised structures and functions
- mature
Describes fully developed cells with a clear identity and role in the body
- specialised
Emphasises that the cells have a particular function (e.g., muscle contraction, nerve signalling)
文法句型
undifferentiated + biological noun (cells, tissue, tumour)
用法筆記
A precise technical term in cell biology and pathology. It is the opposite of 'differentiated', which describes cells that have taken on a specific role (e.g., a muscle cell or a nerve cell). In cancer diagnosis, an undifferentiated tumour is often more aggressive and harder to treat because the cells are growing rapidly without a clear identity.