Rules for singular/plural
Term ending in “a”:
Drop “a” and add “ae”
Term ending in “is”:
Drop “is” and add “es”
Term ends in “nx”:
Drop “nx” add “nges”
Term ends in “um”:
Drop “um” add “a”
Term ends in “us”:
Drop “us” add “i”
Term ends in “y”:
Drop “y” add “ies”
Vertebra = vertebrae
Diagnosis = diagnoses
Phalanx = phalanges
Bacterium = bacteria
Digitus = digiti
Therapy = therapies