Quick Answer The plural of genus is genera or genuses. Both are correct. Use genera in science and formal writing. Use genuses in everyday English. Genera and Genuses — See How They Work The word genus comes from Latin. That is why it has two plural forms. Look at these examples: Did you see the…
Quick Answer The plural of hypothesis is hypotheses. The word “hypothesises” is not correct in English. One: She has a new hypothesis about the result. More than one: The students wrote down their hypotheses before the test. Hypothesis Becomes Hypotheses — See the Pattern Look at these words. Can you see what happens? Did you…
Quick Answer The plural of index is indexes (everyday English) or indices (math and science). Example: “This book has two indexes at the back.” Index, Indexes, Indices — See the Pattern Look at these sentences. Can you see what changes? Did you see the pattern? When you talk about one, you say index. When you…
Quick Answer The plural of matrix is matrices. You can also say matrixes — both are correct. Matrices is more common. One: This matrix shows the data.Many: These matrices show the data. Matrix, Matrices, Matrixes — See the Pattern Look at these words. Can you see what happens? Did you see the pattern? These words…
Quick Answer The plural of memorandum is memoranda (the Latin way) or memorandums (the English way). Both are correct. Most people say “memo” and “memos” in everyday English. Memorandum, Memoranda, Memorandums — See the Pattern A memorandum is a short written message, usually at work. People often call it a “memo” for short. Look at…
Quick Answer The plural of nucleus is nuclei. You might also see nucleuses, but nuclei is the form most people use, especially in science. Nucleus and Nuclei — See the Pattern The word nucleus comes from Latin. That is why the plural does not just add an S. Look at these examples: Did you see…
Quick Answer The plural of octopus is octopuses. You might also hear octopi or octopodes, but octopuses is the most common and correct form. Example: “We saw three octopuses at the aquarium.” Octopus, Octopuses, Octopi — See the Options The word octopus comes from Greek. It means “eight feet.” Because it comes from Greek (not…
Quick Answer The plural of phenomenon is phenomena. One phenomenon, two phenomena. Do not add an S — “phenomenons” is not correct. Phenomenon and Phenomena — See the Pattern The word phenomenon comes from Greek. That is why the plural does not just add an S. Look at these examples: Did you see the pattern?…
Quick Answer The plural of radius is radii. You can also say radiuses — both are correct. Radii is more common. One: The radius of this circle is 5 cm.Many: The radii of these circles are all different. Radius, Radii, Radiuses — See the Pattern Look at these words. Can you see what happens? Did…
Quick Answer Software has no plural form. It is always software — never “softwares.” Example: “We installed new software on all the computers.” “Software” Never Changes — See Why Look at these sentences. What do you notice about the word software? Did you see? The word software stays exactly the same every time — whether…
