1. (adjective) not synchronous; not occurring or existing at the same time or having the same period or phase

• allochronic
• anachronic
• anachronistic
• anachronous
• in series
• nonparallel
• serial
• nonsynchronous
• unsynchronised
• unsynchronized
• unsynchronous

1. (adjective) (digital communication) pertaining to a transmission technique that does not require a common clock between the communicating devices; timing signals are derived from special characters in the data stream itself

• synchronous

2. (adjective) not synchronous; not occurring or existing at the same time or having the same period or phase

• synchronal
• synchronic
• synchronous