The noun arma, -orum is neuter plural always according to my book. I thought neuter nouns ended in -a. What is the -orum then? Thanks.

2 answers

The ending -orum is the genitive form. In the case of this word, since it doesn't have any singular forms, you give the nominative and genitive of the plural.
In the link I gave you above, scroll down to the section called Neuter Nouns ending in -um. Look at the plural column; ignore the singular for this particular word.
Similar Questions
  1. What is the gender of the nouns?The hens stood near the chicks. neuter common feminine masculine
    1. answers icon 1 answer
  2. What is the gender of the nouns?The nun hurriedly climbed the stairs in the chapel. Neuter, common, feminine, masculine
    1. answers icon 1 answer
  3. What is the gender of the nouns?(You can choose more than one.) The principal was calmly walking on the stage. Neuter Common
    1. answers icon 1 answer
  4. How do collective nouns differ from plural nouns?A. Only collective nouns are formed by adding -s or -es to their singular
    1. answers icon 1 answer
more similar questions