| HYPOBLAST | • hypoblast n. (Embryology) A type of tissue that forms from the inner cell mass and later is incorporated into the endoderm. • HYPOBLAST n. the inner or lower layer of the blastoderm.
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| HYPOCAUST | • hypocaust n. An underfloor space or flue through which heat from a furnace passes to heat the floor of a room or a bath. • hypocaust n. An underfloor heating system, even without such an underfloor space or flue, as adapted for modern housing.
 • HYPOCAUST n. an ancient air chamber or series of chambers for heating rooms.
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| HYPONASTY | • hyponasty n. (Botany) an upward bending of leaves or other plant parts, caused by increased growth on their lower surface. • HYPONASTY n. a tendency in part of a plant to grow more rapidly on the underside, so that it curves upwards.
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| HYPOTAXES | • hypotaxes n. Plural of hypotaxis. • HYPOTAXIS n. a dependent or subordinate relationship of clauses with conjunctions.
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| HYPOTAXIS | • hypotaxis n. (Grammar) Syntactic subordination of one clause or construction to another. • HYPOTAXIS n. a dependent or subordinate relationship of clauses with conjunctions.
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| NAPHTHYLS | • naphthyls n. Plural of naphthyl. • NAPHTHYL n. a radical derived from naphthalene.
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| OPSIMATHY | • opsimathy n. Learning or education that occurs late in life. • OPSIMATHY n. education late in life.
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| PANTYHOSE | • pantyhose n. (North America) Women’s thin nylon tights worn over the legs, usually tan in color. • panty␣hose n. Alternative spelling of pantyhose.
 • PANTYHOSE n. tights worn by women or children with ordinary dress, also PANTIHOSE.
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| PHYSIATRY | • physiatry n. (Medicine) The treatment of disabled people. • PHYSIATRY n. the treatment of injury by physical means.
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| PITAHAYAS | • pitahayas n. Plural of pitahaya. • PITAHAYA n. (Spanish) a cactus of southwestern US and Mexico, also PITAYA.
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| PLATYFISH | • platyfish n. Certain fish of the genus Xiphophorus lacking a sword-like extension of the lower tailfin. • PLATYFISH n. a small tropical fish, also PLATY.
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| POLYMATHS | • polymaths n. Plural of polymath. • POLYMATH n. a person of great and varied learning.
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| SYCOPHANT | • sycophant n. One who uses obsequious compliments to gain self-serving favour or advantage from another; a servile flatterer. • sycophant n. One who seeks to gain through the powerful and influential.
 • sycophant n. (Obsolete) An informer; a talebearer.
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| SYMPATHIN | • sympathin n. Any substance (such as adrenaline) released from sympathetic nerve endings. • SYMPATHIN n. a substance secreted by sympathetic nerve-endings, which constricts and dilates blood-vessels.
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| TALLYSHOP | • tallyshop n. Alternative form of tally shop. • tally␣shop n. A shop from which the tally trade is conducted.
 • TALLYSHOP n. a shop where goods are sold on credit to be paid for by instalments.
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