Semi-: half.
Semicircular: like the half of a circle.
Semi-complete: in metamorphosis, = incomplete; q.v.
Semicordate: half or partly heart-shaped.
Semicoronate: partly surrounded by a margin of spines, hooks or the like.
Semicoronet: a margin of spines or hooks partly surrounding a structure or process.
Semi-cylindrical: like a groove or half a cylinder.
Semi-hyaline: hyaline in part only: not altogether transparent.
Semi-looper: a caterpillar in which one or two pairs only of the abdominal legs are wanting and where in progression, only small loops are formed: see looper.
Semi-lunar: in the form of half a crescent.