semilogarithmic

[ sem-ee-law-guh-rith-mik, -rith-, -log-uh-, sem-ahy- ]
/ ˌsɛm iˌlɔ gəˈrɪð mɪk, -ˈrɪθ-, -ˌlɒg ə-, ˌsɛm aɪ- /

adjective Mathematics.

(of graphing) having one scale logarithmic and the other arithmetic or of uniform gradation.
Often sem·i·log.

Origin of semilogarithmic

First recorded in 1915–20; semi- + logarithmic