Definition of protoconch in English:

protoconch

noun ˈprəʊtə(ʊ)ˌkɒŋk

Zoology

The embryonic shell in gastropods and certain cephalopods, often retained at the tip of the adult shell.

Late 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist. From proto- + conch.

nounˈprəʊtə(ʊ)ˌkɒŋk

Zoology

The embryonic shell in gastropods and certain cephalopods, often retained at the tip of the adult shell.

Late 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist. From proto- + conch.

词汇	protoconch
释义	Definition of protoconch in English: protoconch noun ˈprəʊtə(ʊ)ˌkɒŋk Zoology The embryonic shell in gastropods and certain cephalopods, often retained at the tip of the adult shell. Origin Late 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist. From proto- + conch. Definition of protoconch in US English: protoconch nounˈprəʊtə(ʊ)ˌkɒŋk Zoology The embryonic shell in gastropods and certain cephalopods, often retained at the tip of the adult shell. Origin Late 19th century; earliest use found in Richard Owen (1804–1892), comparative anatomist and palaeontologist. From proto- + conch.
随便看	premier danseur premier division premiere premiered premiere danseuse premieres premieress premiering Premier League premiers premiers crus premiership premies pre-milking premillenarian premillenarian premillenarianism premillennial premillennialism premillennialist premillennialist premillennially premillennial tension premillennian Preminger, Otto