My`co*der"ma, n. Etym: [NL., from Gr. my`khs a fungus + de`rma skin.]
1. (Biol.)
Definition: One of the forms in which bacteria group themselves; a more or less thick layer of motionless but living bacteria, formed by the bacteria uniting on the surface of the fluid in which they are developed. This production differs from the zoöloea stage of bacteria by not having the intermediary mucous substance.
2. A genus of microörganisms of which the acetic ferment (Mycoderma aceti), which converts alcoholic fluids into vinegar, is a representative. Cf. Mother.
Source: Webster’s Unabridged Dictionary 1913 Edition
7 May 2025
(noun) a person who is employed to deliver messages or documents; “he sent a runner over with the contract”
Decaffeinated coffee is not caffeine-free. Studies from the National Institute of Health (US) have shown that virtually all decaf coffee types contain caffeine. A 236-ml (8-oz) cup of decaf coffee contains up to 7 mg of caffeine, whereas a regular cup provided 70-140 mg.
