seamless
1. [ adjective ] used especially of skin
Synonyms: unlined unseamed
Examples:

"his cheeks were unlined" "his unseamed face"

Related terms: smooth
2. [ adjective ] not having or joined by a seam or seams
Examples:

"seamless stockings"

Related terms: seamed circular-knit unseamed broadloom
3. [ adjective ] perfectly consistent and coherent
Examples:

"the novel's seamless plot"

Related terms: coherent