j

j

j¹ or J [jā]

n.

pl. J's, j's

1. the tenth letter of the English alphabet: formerly a variant of I, i, in the 17th cent. it became established as a consonant only, as in Julius, originally spelled Iulius

2. any of the speech sounds that this letter represents, as, in English, the j of joy

3. a type or impression for j or J

4. the tenth in a sequence or group

5. an object shaped like J

adj.

1. of j or J

2. tenth in a sequence or group

3. shaped like J

j² [jā]

n.

Physics the imaginary number √P1