Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pectĭnātim, adv. [pecten], in the form of a comb, like the teeth of a comb: cuniculatim, pectinatim divisa, Plin. 9, 33, 52, § 103: digitis pectinatim inter se implexis, id. 28, 6, 17, § 59 (cf.: digitis inter se pectine junctis, Ov. M. 9, 299): serrati (dentes) pectinatim coëuntes, Plin. 11, 37, 61, § 160; so, pectinatim stipante se dentium serie, id. 8, 25, 37, § 89; 8, 21, 30, § 75; Vitr 1, 5.