Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
punctĭo, ōnis, f. [pungo], in medicine, a pricking, puncture: dolores laterum, qui punctionem afferant, a pricking pain, stitch, Plin. 34, 15, 44, § 151.
In plur.: punctiones sentire, Cels. 8, 9, 2; Plin. 25, 13, 94, § 150; Cael. Aur. Acut. 2, 6.