| 释义 |
Definition of dendroid in English: dendroidadjective ˈdɛndrɔɪdˈdendroid Biology (of a plant, marine invertebrate, or structure) tree-shaped; branching. 〔生〕（植物、海洋无脊椎动物或结构）树状的；分枝状的 Example sentencesExamples - Many dendroid colonies in lower Paleozoic trepostomes developed narrow exozones of young presumably feeding autozooids in cycles that covered growing branch tips.
- The tiny conical shells known as dacryoconarids were also abundant and evolving rapidly at this time, but only a few dendroid graptoloids remained from the Silurian faunas.
- The intermediate-level benthos was dominated by sponges, corals, giant bivalves, giant brachiopods, stalked echinoderms and fixed dendroid graptolites.
- Further, older autozooids in major proximal regions of some large dendroid colonies stopped growing skeletons outwardly as distal colony growth continued.
- Subcylindrical forms such as Stachyodes and Amphipora have been called dendroid or twiglike, and aluacerids have been called subcylindrical, cylindrical, or columnar.
nounˈdɛndrɔɪdˈdendroid A graptolite (fossil marine invertebrate) of a type that formed much-branched colonies, found chiefly in the Ordovician and Silurian periods. 〔古生物〕（主要指奥陶纪和志留纪多分枝的笔石群体）树形笔石的 Order Dendroidea, class Graptolithina Example sentencesExamples - In the Early Ordovician, many-branched planktonic forms developed from the attached dendroids.
OriginMid 19th century: from dendro- 'tree' + -oid. Definition of dendroid in US English: dendroidadjectiveˈdendroid Biology (of a plant, marine invertebrate, or structure) tree-shaped; arborescent; branching. 〔生〕（植物、海洋无脊椎动物或结构）树状的；分枝状的 Example sentencesExamples - The intermediate-level benthos was dominated by sponges, corals, giant bivalves, giant brachiopods, stalked echinoderms and fixed dendroid graptolites.
- Many dendroid colonies in lower Paleozoic trepostomes developed narrow exozones of young presumably feeding autozooids in cycles that covered growing branch tips.
- The tiny conical shells known as dacryoconarids were also abundant and evolving rapidly at this time, but only a few dendroid graptoloids remained from the Silurian faunas.
- Subcylindrical forms such as Stachyodes and Amphipora have been called dendroid or twiglike, and aluacerids have been called subcylindrical, cylindrical, or columnar.
- Further, older autozooids in major proximal regions of some large dendroid colonies stopped growing skeletons outwardly as distal colony growth continued.
nounˈdendroid A graptolite of a type that formed much-branched colonies, found chiefly in the Ordovician and Silurian periods. 〔古生物〕（主要指奥陶纪和志留纪多分枝的笔石群体）树形笔石的 Order Dendroidea, class Graptolithina Example sentencesExamples - In the Early Ordovician, many-branched planktonic forms developed from the attached dendroids.
OriginMid 19th century: from dendro- ‘tree’ + -oid. |