a. Of or pertaining to the Chætodonts or the family Chætodontidæ. [ 1913 Webster ]

n. [ Gr. chai`th hair + &unr_;, &unr_;, tooth. ] (Zool.) A marine fish of the family Chætodontidæ. The chætodonts have broad, compressed bodies, and usually bright colors. [ 1913 Webster ]

n. a natural family comprising the butterfly fishes.
Syn. -- family Chaetodontidae. [ WordNet 1.5 ]

a. (Zool.) Of or pertaining to the Chætognatha. [ 1913 Webster ]

n. any worm of the Chaetognatha; transparent marine worm with horizontal lateral and caudal fins and a row of movable curved spines at each side of the mouth.
Syn. -- arrowworm. [ WordNet 1.5 ]

‖ n. pl. [ NL., from Gr. &unr_; hair + &unr_; jaw. ] (Zool) a phylum consisting of the arrowworms, a group of small active transparent free-swimming marine worms, of which the genus Sagitta is the type. They have groups of curved spines on each side of the head.
Syn. -- phylum Chaetognatha. [ 1913 Webster + WordNet 1.5 ]

adj. of or pertaining to the Chaetognatha. [ WordNet 1.5 ]

a. (Zool.) Pertaining to the Chætopoda. -- n. One of the Chætopoda. [ 1913 Webster ]

‖n. pl. [ NL., from Gr. &unr_; hair + -poda. ] (Zool.) A very extensive order of Annelida (segmented worms), characterized by the presence of lateral setæ, or spines, on most or all of the segments. They are divided into two principal groups: Oligochæta, including the earthworms and allied forms, and Polychæta, including most of the marine species. [ 1913 Webster ]

n. [ Gr. &unr_; hair + &unr_; arrangement. ] (Zool.) The arrangement of bristles on an insect. [ 1913 Webster ]