sphenopsid
noun Etymology: ultimately from Greek sphēn wedge + New Latin -opsis Date: 1957 any of a class or division (Sphenopsida or Sphenophyta) of primitive vascular plants characterized by jointed ribbed stems, small leaves usually in whorls at distinct stem nodes, and sporangia in sporangiophores and made up of the horsetails and extinct related forms

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • sphenopsid — /sfi nop sid/, n. equisetoid. [1955 60; < NL Sphenopsida the order which includes horsetails; see SPHEN , OPSIS, ID2] * * * …   Universalium

  • sphenopsid — sphe·nop·sid …   English syllables

  • sphenopsid — sfēˈnäpsə̇d noun ( s) Etymology: New Latin Sphenopsida : a plant or fossil of the subdivision Sphenopsida * * * /sfi nop sid/, n. equisetoid. [1955 60; NL Sphenopsida the order which includes horsetails; see SPHEN , OPSIS …   Useful english dictionary

  • Coal forest — Etching depicting some of the most significant plants of the Carboniferous. Coal forests were the vast swathes of wetlands that extended over much of the tropical land areas during late Carboniferous (Pennsylvanian) and Permian times.[1 …   Wikipedia

  • coal — coalless, adj. /kohl/, n. 1. a black or dark brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Cf. anthracite, bituminous coal, lignite. 2. a piece of glowing, charred, or burned wood or other… …   Universalium

  • equisetoid — /ek weuh see toyd/, n. any plant of the phylum or division Equisetophyta (or Sphenopsida), including the horsetails and many extinct species of the Carboniferous Period. Also called sphenopsid. [ < NL Equiset(um) EQUISETUM + OID] * * * …   Universalium

  • calamophyton — ˌkaləˈmäfəˌtän noun Usage: capitalized Etymology: New Latin, from calam + Greek phyton plant more at phyt : a genus (the type of the family Calamophytaceae) of sphenopsid plants from the Middle Devonian of Germany that have bifurcated leaves and… …   Useful english dictionary

  • cheirostrobus — kīˈrästrəbəs noun Usage: capitalized Etymology: New Latin, from chir + Latin strobus labdanum : a form genus of sphenopsid fossil plants based on only the strobilus which consists of numerous crowded verticils of sporophylls, each sporophyll… …   Useful english dictionary

  • hyeniales — (ˌ)hīˌēnēˈā(ˌ)lēz noun plural Usage: capitalized Etymology: New Latin, from Hyenia + ales : an order of Devonian sphenopsid plants known only in the fossil state see calamophyton, hyenia …   Useful english dictionary

  • equisetoid — /ek weuh see toyd/, n. any plant of the phylum or division Equisetophyta (or Sphenopsida), including the horsetails and many extinct species of the Carboniferous Period. Also called sphenopsid. [ < NL Equiset(um) EQUISETUM + OID] …   Useful english dictionary

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