1. (adjective) equally distant from the extremes

• center
• middle
• midway

2. (adverb) at half the distance; at the middle

• midway

1. (adjective) equally distant from the extremes

• central

2. (adjective) at a point midway between two extremes

• intermediate

3. (adjective) including only half or a portion

• fractional

1. (adjective) equally distant from the extremes

• center
• centre
• midpoint