challenge

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challenge

1. US an assertion that a person is not entitled to vote or that a vote is invalid
2. Law a formal objection to a person selected to serve on a jury (challenge to the polls) or to the whole body of jurors (challenge to the array)

challenge

[′chal·ənj]
(communications)
To cause an interrogator to transmit a signal which puts a transponder into operation.
(immunology)
Administration of an antigen to ascertain state of immunity.
References in periodicals archive ?
Following inhalational challenge of marmosets with B.
The levels of various cell types and cytokines were also measured in the blood of animals following inhalational challenge with Marburg virus [15].