Unusual Plural Forms

Question 1

-a like bursa or vertebra

Answer 1

-ae like bursae or vertebrae

Question 2

-ex or -ix like appendix or index

Answer 2

-ices like appendices or indices

Question 3

-is like diagnosis or metastasis

Answer 3

-es like diagnoses or metastases

Question 4

-itis like arthritis or meningitis

Answer 4

-is ending to -ides like arthritides or meningitides

Question 5

-nx like phalanx or meninx

Answer 5

-x ending to -ges like phalanges or meninges

Question 6

-on like criterion or ganglion

Answer 6

-a like criteria or ganglia

Question 7

-um like diverticulum or ovum

Answer 7

-a like diverticula or ova

Question 8

-us like alveolus or malleolus

Answer 8

-i like alveoli or malleoli