SolrCloud terminology - Why leader is listed as slave and replica is listed as master at admin gui?

[Furkan KAMACI]

When I look at admin gui I see that for a leader:

Replication (Slave) Version Gen Size
Master: 1367309548534 84 779.87 MB
Slave:  1367307649512 82 784.44 MB

and that for a replica:

Replication (Master) Version Gen Size
Master: 1367309548534 84 779.87 MB

isn't it confusing leader is a slave and replica is a master or is it true
for SolrCloud terminology?