Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
altĭpendŭlus, a, um, adj. [alte-pendo], hanging high: aliquot reliquimus altipendulos vindemiae superstites, M. Aur. Ant. ap. Front. Ep. ad M. Caes. 4, 6.