OOPHORE; OOEPHORE n.
An alternately produced form of certain cryptogamous plants, as ferns, mosses, and the like, which bears antheridia and archegonia, and so has sexual fructification, as contrasted with the sporophore, which is nonsexual, but produces spores in countless number. In ferns the oöphore is a minute prothallus; in mosses it…
OPEN a. 25 definitions
Produced by an open string; as, an open tone. The open air, the air out of doors. -- Open chain. (Chem.) See Closed chain, under Chain. -- Open circuit (Elec.), a conducting circuit which is incomplete, or interrupted at some point; -- opposed to an uninterrupted, or Ant: closed circuit. -- Open communion, communion…
ORPIMENT n.
Arsenic sesquisulphide, produced artificially as an amorphous lemonyellow powder, and occurring naturally as a yellow crystalline mineral; -- formerly called auripigment. It is used in king's yellow, in white Indian fire, and in certain technical processes, as indigo printing. Our orpiment and sublimed mercurie. Chauce…