What does longitrorsus mean in Latin?

longitrorsus, a adverb, means “in length, lengthwise, lengthways”.

How do you pronounce longitrorsus?

In classical Latin, [ɫɔŋ.ɡɪˈtrɔr.sʊs]; in ecclesiastical (church) Latin, [lon̠ʲ.d͡ʒiˈtrɔr.sus].

adverb

longitrorsus (not comparable)

Classical[ɫɔŋ.ɡɪˈtrɔr.sʊs]Ecclesiastical[lon̠ʲ.d͡ʒiˈtrɔr.sus]

not comparablein length, lengthwise, lengthways
L o n g i t r o r s u s sic dicitur, sicut dextrorsus, sinistrorsus.1839 [8th century CE], Paulus Diaconus, edited by Karl Otfried Müller, Excerpta ex libris Pompeii Festi De significatione verborum, page 120, line 7:

longĭtrorsus sic dicitur, sicut dextrorsus, sinistrorsus, Paul. ex Fest. p. 120 Müll.

From longus (“long”) + *-trorsus, probably extracted from words such as retrorsus or introrsus.