Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
concoctĭo, ōnis, f. [concoquo]. digestion (not in Cic.), Cels. 1, 8; 3, 22; Plin. 11, 37, 79, § 200; 20, 5, 20, § 42 al.
In plur., Plin. 20, 5, 18, § 37; 27, 7, 28, § 48.