Sproange /spɒˈrændʒ/ is another name for the sporangium /spɒˈrændʒɪəm/ of a plant, which the OED defines as “a receptacle containing spores; a spore-case or capsule.” Sporange comes via Latin from the Greek σπορά spore + ἀγγεῖον (vessel).
Sporange is also the only English word that rhymes with orange, a factoid I discovered on Lexiophiles, which lists a number of other English words that have no rhymes, including month, vacuum, obvious, penguin, husband and whilst. Do you know of words that rhyme with any of these?
A blog called Skorks lists a number of made up words that rhyme with orange, including:
- amoreange – an orange you instantly fall in love with
- quantorange – an orange that is both here and somewhere else at the same time
- tetrahedrorange – an orange shaped like a pyramid
According to the Oxford Dictionaries site, lozenge is a half-rhyme or pararhyme for orange.