See at (def 6).
A species whose presence, absence, or relative well-being in a given environment is a sign of the overall health of its ecosystem. By monitoring the condition and behavior of an indicator species, scientists can determine how changes in the environment are likely to affect other species that are more difficult to study. Compare keystone species.
[in-duh-seez] /ˈɪn dəˌsiz/ noun 1. a plural of . [in-deks] /ˈɪn dɛks/ noun, plural indexes, indices [in-duh-seez] /ˈɪn dəˌsiz/ (Show IPA) 1. (in a nonfiction book, monograph, etc.) a more or less detailed alphabetical listing of names, places, and topics along with the numbers of the pages on which they are mentioned or discussed, usually […]
[in-dish-ee-uh] /ɪnˈdɪʃ i ə/ plural noun, singular indicium. 1. a postal marking used rather than a stamp or a regular cancellation on each item in a large shipment of prepaid mail. 2. Often, indicium. [in-dish-ee-uh m] /ɪnˈdɪʃ i əm/ noun, plural indicia [in-dish-ee-uh] /ɪnˈdɪʃ i ə/ (Show IPA), indiciums. 1. (def 2). /ɪnˈdɪʃɪə/ plural noun […]
[in-dish-uh l] /ɪnˈdɪʃ əl/ adjective 1. of, relating to, or resembling an indication; indicative: behavior indicial of a personality disorder. 2. of, relating to, or resembling an index or an index finger.
noun, Mathematics. 1. an equation that is obtained from a given linear differential equation and that indicates whether a solution in power series form exists for the differential equation.