sera

Definition

Sera is the plural form of the noun serum. - serum (singular) → sera (plural) - Refers to the clear, pale-yellow liquid component of blood that remains after clotting factors have been removed. It does not contain blood cells or clotting proteins. - In a broader medical or biological context, "sera" can also refer to any fluid that resembles blood serum, such as a nutrient solution used in cell culture.

Usage Examples
  • (Plural: multiple samples of blood serum.)
  • (Plural: serum samples from various animals.)
  • (Plural: serum samples from human subjects.)
Advanced Usage
  • "Immune sera": Sera that contain antibodies against specific antigens, often used for therapeutic or diagnostic purposes.
    • The hospital used immune sera to treat the snakebite victim. (Sera containing antibodies to neutralize venom.)
  • "Normal sera": Sera obtained from healthy individuals, used as controls in experiments.
    • The study compared the test group's sera with normal sera from volunteers. (Control samples from healthy people.)
Variants and Related Words
  • Serum (noun, singular): the individual fluid itself.
    • The serum was separated from the blood clot by centrifugation. (One sample of blood serum.)
  • Serology (noun): the scientific study of blood sera and immune responses.
    • Serology tests detect antibodies in patient sera. (The field of studying serum components.)
  • Serous (adjective): relating to or resembling serum.
    • The serous fluid lubricates the membranes around the organs. (Fluid similar to blood serum.)
Synonyms
  • Plasma (when referring to blood fluid): the liquid part of blood that includes clotting factors, whereas sera do not.
    • Plasma is similar to sera but contains clotting proteins. (A related but distinct fluid.)
  • Antiserum (a specific type of sera): serum containing antibodies against a particular pathogen.
    • The antiserum was administered to the patient. (A specialized therapeutic serum.)
Phrasal Verbs
  • None directly associated with "sera," as it is a noun. However, the verb to serotype is related:
    • Scientists serotype bacterial strains using specific sera. (Classify bacteria based on reactions with sera.)
Related Idioms
  • None commonly associated with "sera." The word is primarily used in technical, medical, or scientific contexts.

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