Term: sinornis: sparrow-sized fossil bird of the Jurassic period to the Cretaceous period having a keeled breastbone and vestigial tail; found in China; considered possibly the second most primitive of all birds
Broader: chordate: any animal of the phylum Chordata having a notochord or spinal column | Unrelated: secretion: the organic process of synthesizing and releasing some substance
Broader: chordate: any animal of the phylum Chordata having a notochord or spinal column | Unrelated: keyhole limpet: marine limpet having a conical shell with an opening at the apex
Broader: chordate: any animal of the phylum Chordata having a notochord or spinal column | Unrelated: aleurites: candlenut
Broader: chordate: any animal of the phylum Chordata having a notochord or spinal column | Unrelated: scaling: ascent by or as if by a ladder
Broader: chordate: any animal of the phylum Chordata having a notochord or spinal column | Unrelated: long tom: a long swivel cannon formerly used by the navy
Broader: chordate: any animal of the phylum Chordata having a notochord or spinal column | Unrelated: second vatican council: the Vatican Council in 1962-1965 that abandoned the universal Latin liturgy and acknowledged ecumenism and made other reforms
Broader: chordate: any animal of the phylum Chordata having a notochord or spinal column | Unrelated: palace: the governing group of a kingdom
Broader: chordate: any animal of the phylum Chordata having a notochord or spinal column | Unrelated: club: a formal association of people with similar interests
Broader: chordate: any animal of the phylum Chordata having a notochord or spinal column | Unrelated: pyrrosia: epiphytic or lithophytic or terrestrial ferns of tropical Old World
Broader: chordate: any animal of the phylum Chordata having a notochord or spinal column | Unrelated: cartilage: tough elastic tissue; mostly converted to bone in adults