1. The dorsal portion of the midbrain, containing the superior colliculus and inferior colliculus

Encyclopedia: Tectum

• spacewalker
• spaceward
• spacewards
• spacewoman
• spacey
• spacial
• spacing
• spaciotemporal
• spacious
• spaciously
• spaciousness
• spackle
• spackling compound
• spacy
• spade
• spade bit
• spade casino
• spade-like
• spade-shaped
• spadefish
• spadefoot
• spadefoot toad
• spadeful
• spadework
• spadille